Answer:
No it isn't proportional because
7/10 = 21/28 is wrong
21/3=7 so for it to be proportional you need to multiply three
However
10 * 3 does NOT = 28 since it equals 30
7/10 can be equivalent to 14/20 which is multiplying both numerator and denominator by 2
OR...
21/28 can be equivalent to 42/56 which is multiplying both numerator and denominator by 2
Hope this helps!
Have a nice day :D
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