Subtract 81/70 from 63/12, Solve 5 3/12

Subtract 81/70 from 63/12

1^st number: 5 3/12, 2^nd number: 1 11/70

63/12 - 81/70 is 573/140.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 12 × 35 = 420,
63/12 = 63 × 35/12 × 35 = 2205/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
81/70 = 81 × 6/70 × 6 = 486/420
Subtract the two like fractions:
2205/420 - 486/420 = 2205 - 486/420 = 1719/420
After reducing the fraction, the answer is 573/140
In mixed form: 413/140

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