Foundation June 2022 Paper 2R Q15

15 Kim spends \(\$N\)

Of this, she spends
    40% on food
    \(\dfrac{1}{4}\) on clothes
    and the rest on petrol

Kim spends \(\$P\) on petrol.

Work out the ratio \(P : N\) in the form \(a : b\) where \(a\) and \(b\) are integers.
Give your answer in its simplest form.

(4)