Answer:
No
Step-by-step explanation:
To find out if the fractions are proportional, we have to first simplify them if needed.
We can simplify 12/21 by dividing the numerator and denominator by 3.
12 ÷ 3 = 4
21 ÷ 3 = 7
The simplified fraction is 4/7
3/7 and 4/7 are not equal, so the fractions are not proportional.
