Question

A greengrocer sells melons at a profit of 37.5% on price he pays for it.What is the ratio of cost price to selling price

Answer 1

s-selling price
c-cost price
p-profit
p=37,5%
$\frac{s-c}{s}$*100%=37,5%  /:100%
$\frac{s-c}{s}$=0,375   /*s
s-c=0,375*s  /-s
0-c=-0,625*s /:(-s)
$\frac{c}{s}$=0,625