math
posted by
Shorty on
.
40 is 42% of what number? (set this up with a variable,simplify)

math 
Ms. Sue,
0.42x = 40
x = 40/0.42
x = 95.238

math 
Bosnian,
42 % = 42 / 100
40 = x * 42 / 100 Multiply both sides by 100
40 * 100 = 42 x
4000 = 42 x Divide both sides by 42
4000 / 42 = x
x = 95.238
OR
42 % = 42 / 100 = 0.42
x = 40 / 0.42 = 95.238