Subtract 21/12 from 70/10, Solve 7 0/10

Subtract 21/12 from 70/10

1^st number: 7 0/10, 2^nd number: 1 9/12

70/10 - 21/12 is 21/4.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 10 × 6 = 60,
70/10 = 70 × 6/10 × 6 = 420/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60
Subtract the two like fractions:
420/60 - 105/60 = 420 - 105/60 = 315/60
After reducing the fraction, the answer is 21/4
In mixed form: 51/4

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