Question

A milk carton holds 3/5 liters, another holds 1 1/4 liters, and a third holds 1/2 liter less than the second. How much more milk does the third carton hold than the first?

Answer 1

the third holds 3/20 more than the 1st

Answer 2

the 1st holds 3/5
the 2nd holds 1 1/4
the 3rd holds : 1 1/4 - 1/2 = 5/4 - 1/2 = 5/4 - 2/4 = 3/4

how much more does the 3rd hold then the 1st...
3/4 - 3/5 = 15/20 - 12/20 = 3/20 <== it holds 3/20 more