To solve percent problems, use the following dictionary.
Replace 'what' with x.
Replace 'is' with the equal sign.
Replace 'percent' with divide by 100, /100.
Replace 'of' with the multiplication symbol, *.
What is twenty percent of seventy?
x = 20/100*70
Thirty is what percent of ninety?
30 = x/100*90
Twenty is sixty percent of what number?
20 = 60/100*x