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

Ask ManyTutors
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
AC Lim
Ac Lim's answer
12512 answers (A Helpful Person)
1st
You can make the 25%= 1u and 100%=4u first... and 20%=1u. Hope this helps.