Question

a laboratory technician had a bottle that was 5/8 full if the technician used 3/4 of the bottles content, what fractional amount is left in the bottle

Answer 1

Assume 5/8 as 1(initial vol)
1 : 3/4
5/8 : 15/32
15/32 is ratio of content used
Thus,
5/8 - 15/32 = amount left in bottle = 5/32