3 over 2
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To simplify 21 over 40, you need to find the greatest common divisor (GCD) of 21 and 40, which is 1. Then, divide both the numerator and the denominator by the GCD to get the simplified form. Therefore, 21 over 40 simplified is 21/40.
7/12
19/21
It is 21/25
It is 7/50