Question

What is three quarters of £42 and a quarter of £42

Answer 1

3/4 * 42 = 3(1/4 * 42) = 3((42 / 2) / 2) = 3(21 / 2) = 3*10.5 = 31.5
1/4 * 42 = (42/2) / 2 = 10.5

Answer 2

$three \ quarters \to \frac{3}{4} \\\\ \frac{3}{4} \ of \ 42\£ = \\\\ =\frac{3}{4}*42\£= \\\\ =\frac{3}{2}*21\£= \\\\ =\frac{63\£}{2} = \\\\= \boxed{31.5\£} \\\\\\\ a \ quarter \to \frac{1}{4} \\\\ \frac{1}{4} \ of \ 42\£= \\\\ =\frac{1}{4}*42\£= \\\\ =\frac{21\£}{2}= \\\\ =\boxed{10.5\£}$