Subtract 28/30 from 12/7, Solve 1 5/7

Subtract 28/30 from 12/7

1^st number: 1 5/7, 2^nd number: 28/30

12/7 - 28/30 is 82/105.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 7 × 30 = 210,
12/7 = 12 × 30/7 × 30 = 360/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
28/30 = 28 × 7/30 × 7 = 196/210
Subtract the two like fractions:
360/210 - 196/210 = 360 - 196/210 = 164/210
After reducing the fraction, the answer is 82/105

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