Question

You have 18 stamps from Mexico in your stamp collection. These stamps represent 3/8 of your collection. The rest of the stamps are from the United States. How many stamps are from the United States

Answer 1

48 stamps are from the United States

Answer 2

Let the total collection of stamps with you be 'x'

Number of Mexico stamps = 18

$\frac{3}{8}\times x$ = 18

3x = 8*18

3x = 144

x = 48

So total number stamps you have are 48

So United States stamps = Total number of stamps - Number of stamps of Mexico

48 -18 = 30

Number of stamps from the United States are 30