Answer:
80
Step-by-step 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!
[tex]0.9*x=72[/tex]
We can multiply both sides of this equation by 100, and then divide by 90. After all of this, we have
[tex]x=72*10/9[/tex], which is 80.
