# Question 06e30

Dec 8, 2016

The mark up was $10. #### Explanation: This question can be rewritten as: What is 25% of$40.

"Percent" or "%" means "out of 100" or "per 100", Therefore 25% can be written as $\frac{25}{100}$
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When dealing with percents the word "of" means "times" or "to multiply".

Finally, lets call the number we are looking for "m" for "mark-up".

Putting this altogether we can write this equation and solve for $m$ while keeping the equation balanced:

m = 25/100 xx $40 m = 1/4 xx$40

m = \$10#