Answer:
5
Step-by-step explanation:
10 = 1* 2*5
15= 1*3*5
HCF = 5
1. D
84% or 42/50
1/5
1/3 x 3/4 x 4/5
1/3 x 3/4 = 3/12
3/12 x 4/5 = 12/60
12/60 = 1/5