Staples pays George Nagovsky an annual salary of $40,000. Today, George’s boss informs him that he will receive a $4,300 raise. What percent of George’s old salary is the $4,300 raise? (Round to the nearest tenth percent. Omit the "%" sign in your response.)
increase and descrease
To find the increased mileage Maria will get with her new tires:
Step 1: Find 9% of 18 -> 18 X .09 = 1.62
Step 2: Add the percentage to the original miles -> 18 + 1.62 = 19.62 mpg
Before I address your specific question, I want to give a few tips on understanding word problems with percentages...
The word "of" means multiplication
The word "is" means equals
Percent means move the decimal two places to the left
Increase means 1 + the percentage as a decimal
With these tips in mind, I will try to walk you through this problem
If we begin by changing the percentage to a decimal, we have:
9% = .09
Because we are looking at an increase, we will add 1 to the decimal equivalent of the fraction.
1 + .09 = 1.09
We are now wanting to learn what a 9% increase "of" 18 mpg "is".
1.09 X 18 = 19.6 mpg
After = 9% better
9% better than what?
It means 9% better than the before amount
To find 9% of th before amount of 18 mpg
9% = 0.09
(0.09)(18 mpg) = 1.62 mpg
If it is better than we need to add this amount to the before amount
After = 18 + 1.62 = 19.62 mpg