Question

Maurice has completed 72 pages of the research paper he is writing. That is 90% of the required length of the paper. What is the required length of the paper? ​

Answer 1

its 100 pages ................

Answer 2

80

Explanation:

When we first look at this, it generally says "90% of what number is 72?" so that's what we can do.

We can change 90% into a decimal, and put in x, which is what our answer will be!

`0.9*x=72`

We can multiply both sides of this equation by 100, and then divide by 90. After all of this, we have

`x=72*10/9`, which is 80.