Subtract 7/6 from 42/80, Solve 42/80

Subtract 7/6 from 42/80

1^st number: 42/80, 2^nd number: 1 1/6

42/80 - 7/6 is -77/120.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 6 is 240

Next, find the equivalent fraction of both fractional numbers with denominator 240
For the 1st fraction, since 80 × 3 = 240,
42/80 = 42 × 3/80 × 3 = 126/240
Likewise, for the 2nd fraction, since 6 × 40 = 240,
7/6 = 7 × 40/6 × 40 = 280/240
Subtract the two like fractions:
126/240 - 280/240 = 126 - 280/240 = -154/240
After reducing the fraction, the answer is -77/120

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