Question

There are about 1,400,000 drops in 25 gallons of liquid. What percent of a gallon is a single drop?

Answer 1

If there are 1,400,000 drops in 25 gallons:
1 drop = 25 gallons : 1,400,000 = 0.0000178 gallons
It is 0.00178 % of a gallon.