Subtract 45/7 from 12/30, Solve 12/30

Subtract 45/7 from 12/30

1^st number: 12/30, 2^nd number: 6 3/7

12/30 - 45/7 is -211/35.

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

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210
Likewise, for the 2nd fraction, since 7 × 30 = 210,
45/7 = 45 × 30/7 × 30 = 1350/210
Subtract the two like fractions:
84/210 - 1350/210 = 84 - 1350/210 = -1266/210
After reducing the fraction, the answer is -211/35

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