Faith Ng's answer to katie's Primary 6 Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Faith Ng
Faith Ng's answer
56 answers (Tutor Details)
hello! the reason why you multiply the $72 by 2 again is because for $72 is one unit. Rachel contributes 2 units. Let me know if you need further explanation! :)