AC Lim's answer to Mag's Primary 5 Maths Fractions Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
AC Lim
Ac Lim's answer
12504 answers (A Helpful Person)
1st
Remaining ⅗ = ¼ of total
Remaining ⅗ = ³/12 of total.
Therefore,
7u = 518
1u = 74
Total spend = 1- 3/12 = 9/12
9u = 9×74 = $666
Hope this helps