Respuesta :

Answer:  C

Step-by-step explanation:

21/ 15

CANCEL BOTHBY 3

7/5

Answer:

21 : 15

Step-by-step explanation:

Multiplying the parts of the ratio by the same value creates an equivalent ratio

Given

7 : 5 ← multiply both parts by 3, gives

= 21 : 15

RELAXING NOICE
Relax