1. what is 40% of 75
75 x 40 / 100
3000 / 100
30
3. 100%/x%=90/30
(100/x)*x=(90/30)*x - we multiply both sides of the equation by x
100=3*x - we divide both sides of the equation by (3) to get x
100/3=x
33.3333333333=x
x=33.3333333333
I'll let Rar do the rest!! <3