Question

Choose all the ratios below that are equivalent to 7, colon, 47:4.
Answer
Attempt 1 out of 2
35, colon, 2035:20
42, colon, 2442:24
28, colon, 1628:16
16, colon, 2816:28
21, colon, 1221:12

Answer 1

Equivalent to 7:4 are 35:20, 42:24, 28:16, and 21:12.

Reason: each is 7:4 multiplied by an integer factor:
- 35:20 = 7·5 : 4·5
- 42:24 = 7·6 : 4·6
- 28:16 = 7·4 : 4·4
- 21:12 = 7·3 : 4·3

16:28 is 4:7 (the reciprocal), so it is not equivalent.