3.2% of 500 × 2. 4% of ? = 312

$\mathrm{Given} 3.2\% \mathrm{of} 500 \times 2. 4\% \mathrm{of} ? = 312\mathrm{Then},3.2 x \frac{500}{100} x 2.4 x \frac{?}{100} = 31216 x \frac{2.4x?}{100} = 312\frac{9.6 x ?}{25} = 3129.6 x ? = 7800? = \frac{7800}{9.6}? = 812.5$