Wong Yong Hui's answer to Eric Lee's Primary 6 Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Wong Yong Hui
Wong Yong Hui's answer
2 answers (Tutor Details)
1st
Visualize what is going on. Not appropriate to confuse solution that uses ratio directly, because it is difficult to present the concept/answers accurately with words.