What is 72% of 90

Question

This question deals with using either multiplication, division, or "The Butterfly Method"

Answer 1

Simply convert the percent into decimal form (or fractional form if you prefer). 72% is 0.72.

The word "of" indicates the operation of multiplication between 0,72 and 90.

The word "is" indicates where the equal sign goes and the word "what" is the unknown.

To write it mathematically, you would write w = 0.72 x 90.

To solve, you would simply multiply. w = 64.8

Hope this helps. Let me know if you have any questions.

Answer 2

Step 1: Convert the Percentage to a Decimal

1. 72% as a decimal is 0.72 (since 72% = 72/100).

Step 2: Multiply by the Number

1. Multiply 0.72 by 90:
2. 0.72×90=64.80.72×90=64.8

Final Answer

72% of 90 is 64.8.

Answer 3

Method #1: 72% as a decimal is 0.72 and the word of means to multiply so we can write this as 0.72 x 90. The product of 0.72 and 90 is 64.8 so 72% of 90 is 64.8.

Method #2: You can set up a proportion Part/Whole = %/100

The 72% is the percent and 90 is the whole the because it comes after the word of. We are trying to find the part.

x/90 = 72/100

To solve for x we can use the cross multiply method. 100 times x must equal 90 x 72

100x = 6,480

To solve, we must divide both sides by 100. 6480/100=64.8 so x = 64.8.

Answer 4

To find 72% of 90, you can use the multiplication method. Here’s how you can do it:

1. Convert the percentage to a decimal: 72%=0.7272\% = 0.7272%=0.72
2. Multiply the decimal by the number: 0.72×900.72 \times 900.72×90

So,

0.72×90=64.80.72 \times 90 = 64.80.72×90=64.8

Therefore, 72% of 90 is 64.8.

Using division:

1. Divide 90 by 100 to find 1% of 90: 90÷100=0.990 \div 100 = 0.990÷100=0.9
2. Multiply the result by 72 to find 72%: 0.9×72=64.80.9 \times 72 = 64.80.9×72=64.8

The result is the same, 64.8.

For completeness, here is how you might think of this using a fraction, which is related to "The Butterfly Method":

1. Convert 72% to a fraction: 72100\frac{72}{100}10072​
2. Multiply the fraction by 90: 72100×90\frac{72}{100} \times 9010072​×90

This simplifies as follows:

72×90100=6480100=64.8\frac{72 \times 90}{100} = \frac{6480}{100} = 64.810072×90​=1006480​=64.8

Again, 72% of 90 is 64.8.

Answer 5

To find 72% of 90, follow these steps:

1. **Understand Percentages**: Percent means per hundred. So, 72% is equivalent to 72 out of 100.

2. **Convert Percent to Decimal**: To make it easier, convert 72% to a decimal. Divide 72 by 100:

\[

72\% = \frac{72}{100} = 0.72

\]

3. **Calculate**: Now, multiply the decimal (0.72) by 90 (the number we want to find the percentage of):

\[

0.72 \times 90 = 64.8

\]

4. **Answer**: Therefore, 72% of 90 is 64.8.

So, 72% of 90 is 64.8.

Answer 6

The multiplication method for finding out what 72% of 90 is starts with converting the percentage (72%) to a decimal (which would be 0.72). Then, you multiply 0.72 by 90.

The answer turns out to be 64.8.

Answer 7

I have worked out this question in this video. Check it out and let me know if you have any additional questions. Take care,

Dr. Christal-Joy Turner

Answer 8

Method 1 - Change 72% into the decimal 0.72. Then multiply (90 x 0.72 = 64.8) 72% of 90 is 64.8, or

Method 2 - Change 72% into the Fraction 72/100 (seventy-two hundredths, or 72 out of 100. Then simplify to 18/25 (72 and 100 share a factor of 4). Change 90 into the Fraction 90/1 (All Whole Numbers have a Denominator of 1). Then multiply(90/1 x 18/25 = 1620/25), then (1620 / 25 = 64.8).

I would recommend method 1 :)

Answer 9

One thing to remember is that percents are striving for 100%, just like Cousin Decimals strive for 1 Whole (1.0), and Cousin Fractions strive for 1 Whole (90/90 = 1 Whole, in this case.). With this in mind, there are 3 ways to go about this:

#1 - Convert 72% into the decimal 0.72 (seventy-two hundredths), then multiply (90 x 0.72 = 64.8)

72% of 90 is 64.8, or 65 if you need to round to the nearest Whole number.

#2 - Convert 72% into the Fraction 72/100 (seventy-two hundredths, or 72 out of 100), then simplify to

18/25 (72 and 100 share a factor of 4).

Convert 90 into the Fraction 90/1 (All Whole Numbers have a Denominator of 1), then multiply

(90/1 x 18/25 = 1620/25), then divide (1620 / 25 = 64.8).

72% of 90 is 64.8, or 65 if you need to round to the nearest Whole number.

#3 - Divide 72 by 90 (Just like Fraction 72/90 is the same thing as 72 out of 90). The original quotient is 0.648, but since 90 is a 2-digit Whole number, we have to move our decimal two places to the right, making it 64.8. This is a more complicated, perhaps confusing, method, but it works.

72% of 90 is 64.8, or 65 if you need to round to the nearest Whole number.