A Philips's answer to yoko ono's Primary 6 Maths Fractions Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
A Philips
A Philips's answer
864 answers (A Helpful Person)
The folded part forms 2 triangles. So have take away these 2 triangles to get the answer