A jug holds 40 litres of pure juice. 8 litres are poured out and replaced with water, twice. What percentage of the jug is now juice?

Explanation

1. 01

   Each replacement keeps $\frac{32}{40} = \frac{4}{5}$ of the juice.

2. 02

   After two: $\left(\frac{4}{5}\right)^2 = \frac{16}{25} = 64\%$.