Subtract 75/42 from 42/72, Solve 42/72

Subtract 75/42 from 42/72

1^st number: 42/72, 2^nd number: 1 33/42

42/72 - 75/42 is -101/84.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
42/72 = 42 × 7/72 × 7 = 294/504
Likewise, for the 2nd fraction, since 42 × 12 = 504,
75/42 = 75 × 12/42 × 12 = 900/504
Subtract the two like fractions:
294/504 - 900/504 = 294 - 900/504 = -606/504
After reducing the fraction, the answer is -101/84

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