A box contained black and white beads. At first, the number of black beads was 1/3 the number of
white beads. After 1/4 of the black beads and
3/8 of the white beads were used, 63 beads left
(a) What fraction of the beads were used?
Leave your answer in the simplest form.
(b) How many beads were there in the box at first?
I don’t need help just letting random people try this question
Source: PSLE 2019