Question

A grocer bought 480 eggs at 18 per dozen he sold them at a gain of 15 percentage find the selling price of 100 eggs

Answer 1

$480 \div 12 = 40 \times 18 = 720 \\ 1 = 1.5 \\ 100 = 150 \\ 150 \times \frac{15}{100} = 15 \times \frac{15}{10} \\ 15 \times \frac{3}{2} = 45 \div 2 = 22.5 \\ 150 + 22.5 = 172.5$