Question

Find the missing number in this proportion. ?/8 =16/64

Answer 1

$\dfrac{?}{8}=\dfrac{16}{64}\ \ \ |cross\ multiply\\\\64?=8\cdot16\\\\64?=128\ \ \ \ |divide\ both\ sides\ by\ 64\\\\\boxed{?=2}\\\\Other\ method:\\\\\dfrac{?}{8}=\dfrac{16}{64}\\\\64:8=\boxed8\to16:\boxed8=2\\\\\boxed{\frac{2}{8}=\frac{16}{64}}$

Answer 2

2/8 = 16/64
1/4 = 1/4 ..................