Subtract 45/35 from 63/21, Solve 3 0/21

Subtract 45/35 from 63/21

1^st number: 3 0/21, 2^nd number: 1 10/35

63/21 - 45/35 is 12/7.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105
Likewise, for the 2nd fraction, since 35 × 3 = 105,
45/35 = 45 × 3/35 × 3 = 135/105
Subtract the two like fractions:
315/105 - 135/105 = 315 - 135/105 = 180/105
After reducing the fraction, the answer is 12/7
In mixed form: 15/7

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