Subtract 36/45 from 75/21, Solve 3 12/21

Subtract 36/45 from 75/21

1^st number: 3 12/21, 2^nd number: 36/45

75/21 - 36/45 is 97/35.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 21 × 15 = 315,
75/21 = 75 × 15/21 × 15 = 1125/315
Likewise, for the 2nd fraction, since 45 × 7 = 315,
36/45 = 36 × 7/45 × 7 = 252/315
Subtract the two like fractions:
1125/315 - 252/315 = 1125 - 252/315 = 873/315
After reducing the fraction, the answer is 97/35
In mixed form: 227/35

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