sstrike's answer to Choo's Primary 6 Maths Percentage Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
sstrike
Sstrike's answer
5393 answers (A Helpful Person)
30% = 3/10
LCM → 5 , 8 , 10 → 40