Subtract 75/27 from 90/42
1st number: 2 6/42, 2nd number: 2 21/27
90/42 - 75/27 is -40/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
90/42 = 90 × 9/42 × 9 = 810/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
75/27 = 75 × 14/27 × 14 = 1050/378 - Subtract the two like fractions:
810/378 - 1050/378 = 810 - 1050/378 = -240/378 - After reducing the fraction, the answer is -40/63
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