Question

18 is what percent of 20?

Answer 1

This is asking what times 20 gets you 18. So we set up our equation:

20 * x = 18

Next we solve for x by dividing 20 to both sides:

x = 18/20

x = 0.9

So we get x = 0.9 or 90%.
Hopes this helps! :D

Answer 2

18 is 90% of 20

Here's how to do it:
(18÷20) × 100
0.9 × 100
= 90%