Subtract 80/8 from 7/30, Solve 7/30

Subtract 80/8 from 7/30

1^st number: 7/30, 2^nd number: 10 0/8

7/30 - 80/8 is -293/30.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 30 × 4 = 120,
7/30 = 7 × 4/30 × 4 = 28/120
Likewise, for the 2nd fraction, since 8 × 15 = 120,
80/8 = 80 × 15/8 × 15 = 1200/120
Subtract the two like fractions:
28/120 - 1200/120 = 28 - 1200/120 = -1172/120
After reducing the fraction, the answer is -293/30

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