Question

Determine if 2.25/10 = 9/40, 2.5/10 = 90/40,
or 2.25/12 = 90/40
is a proportion.(1 point)
Responses

None of these sets of ratios is a proportion.
None of these sets of ratios is a proportion.

2.510 = 9040
2.510 = 9040

2.2512 = 9040
2.2512 = 9040

2.2510 = 940

Answer 1

Only the first is a proportion.

Check: 2.25/10 = (9/4)/10 = 9/40, so 2.25/10 = 9/40 is true.
2.5/10 = 0.25 but 90/40 = 2.25, not equal.
2.25/12 = 0.1875 but 90/40 = 2.25, not equal.