Question

If 12 upon 15 = x upon 40 then find the value of x

Answer 1

$hey \: mate \: \\ here \: is \: your \: answer \\ \\ \frac{12}{15} = \frac{x}{40} \\ cross \: multiplication \\ \: 12(40) = x(15) \\ 480 = 15x \\ x = 480 \div 15 = 32 \\ x = 32 \: \\ \frac{12}{15} = \frac{32}{40}$