Subtract 70/42 from 54/75, Solve 54/75

Subtract 70/42 from 54/75

1^st number: 54/75, 2^nd number: 1 28/42

54/75 - 70/42 is -71/75.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 42 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 75 × 14 = 1050,
54/75 = 54 × 14/75 × 14 = 756/1050
Likewise, for the 2nd fraction, since 42 × 25 = 1050,
70/42 = 70 × 25/42 × 25 = 1750/1050
Subtract the two like fractions:
756/1050 - 1750/1050 = 756 - 1750/1050 = -994/1050
After reducing the fraction, the answer is -71/75

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