Answer:
40%
Step-by-step explanation:
(21 - 15)/15 x 100 =
(6/15) x 100 = 40%
search it up on g o o g le
(13/15 - 7/10)
take lcm
<u>13*2 - 7*3</u> = 5/30*100= 50/3%
30
Assumed that sides are equal
CB