Deepa mixes 15 litres of a 40% sugar syrup with 10 litres of a second syrup. The mixture is 34% sugar. What is the sugar percentage of the second syrup?

Explanation

1. 01

   Sugar in the mixture = $0.34 \times 25 = 8.5$ litres.

2. 02

   Sugar from the first syrup = $0.40 \times 15 = 6$ litres.

3. 03

   Second syrup: $\frac{8.5 - 6}{10} = 0.25$, i.e. 25%.