Question

Determine if the given numbers are in proportion
7 hours: 4 hours and $21:$9​

Answer 1

Answer:

4 / 3

Step-by-step explanation:

7 hours : 4 hours and 21 : 9

7 : 4 and 21 : 9

7 × 9 = 21 × 4

63 = 84

X = 84 / 63

X = 4 / 3