Subtract 15/70 from 80/12, Solve 6 8/12

Subtract 15/70 from 80/12

1^st number: 6 8/12, 2^nd number: 15/70

80/12 - 15/70 is 271/42.

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,
80/12 = 80 × 35/12 × 35 = 2800/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
15/70 = 15 × 6/70 × 6 = 90/420
Subtract the two like fractions:
2800/420 - 90/420 = 2800 - 90/420 = 2710/420
After reducing the fraction, the answer is 271/42
In mixed form: 619/42

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