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# what is 2% of 5.100?

a.10 b.102 ,c.204 or d.255

### 5 Answers by Expert Tutors

Katherine P. | Shoreview Area Math Tutoring and Test PrepShoreview Area Math Tutoring and Test Pr...
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2

5.100 x 2%/100%  <-- this is how we convert the percentage to a decimal so that we can work with it

5.1 x 0.02  <-- notice I dropped those 00's after the tenths place, we don't need them, test makers use tricks like that to make a problem seem more difficult than it really is

0.102 <-- which is answer option b.

Hope this helps!

Adrian C. | Patient, Caring, Efficient Math Tutor Specializing in pre- alg to CalcPatient, Caring, Efficient Math Tutor Sp...
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Let's look at a simpler number.  Multiply 5.100 by 1000 which = 5,100

Since 2% is 2 out of 100 and since there are 51 of 100s in 5,100

Then 51 X 2 = 102

After, you divide by 1000 and you have .102 which is choice B)

Mike C. | Enthusiastic Tutor for Middle and High School StudentsEnthusiastic Tutor for Middle and High S...
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Serge S. | PhD student tutoring in math, English, and beyond!PhD student tutoring in math, English, a...
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If you would like to do it in your head, you can move the decimal (of 5.1) two places to the left, which will give you .051 which is equivalent to 1%. Then multiply this (.051) by 2 and you will have 2% of 5.1, which is .102

Rule: Anytime you need to find 10% move the decimal to the left once. Anytime you need to find 1% move the decimal to the left two places.

Devin P. | Devin Accounting Finance and MathDevin Accounting Finance and Math
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(B) .102

You multiple 5.100 by .02 (which is what we get after converting 2% to a decimal).