Question

The value of ratio to determine which are equivalent to 7:15?

A. 21:45
B. 14:45
C. 3:5
D. 63:135

Answer 1

Both A and D are.
If you multiply both 7 and 15 by 3, you get 21 and 45.
If you multiply both 7 and 15 by 9, you get 63 and 135.