Respuesta :

wegnerkolmp2741o

Answer:

21 to 28

Step-by-step explanation:

15:20

Divide each side by 5

15/5 : 20/5

3:4

we want to find the one that is 3:4

5 to 10  Divide by 5   5/5 to 10/5   1 to 2

18:25    this does not simplify

21 to 28   divide by 7   21/7 to 28/7    3 to 4

24:30 divide by 6  24/6: 30/6  4:5

thepinkgodess

Answer:

21 to 28

Step-by-step explanation:

1. Divide each side by 5 (3:4)

2. Multiply each side by 7 (21 :28)