A number increased by 37 1⁄2 % gives 33. The number is
Give a variable name (usually a letter, maybe x) to the number.
Now it reads:
x increased by 37 1/2% ( of x) gives 33, or
x + (37 1/2 % * x) = 33
x + (37.5%x) = 33
1x + (.375x) = 33
1.375x = 33
Divide both sides by 1.375
x = 24