Question

Three person can build a small house in 8 days. To build the same house in 6 days, how many person are required ? ( ratio and proportion )​

Answer 1

$= 8 \times 3 = 24 \\ = x \times 6 = 8 \times 3 \\ = 6x = 8 \times 3 \\ 6x = 24 \\ \frac{24}{6} = x \\ x = 4$