Subtract 42/36 from 30/84
1st number: 30/84, 2nd number: 1 6/36
30/84 - 42/36 is -17/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
30/84 = 30 × 3/84 × 3 = 90/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
42/36 = 42 × 7/36 × 7 = 294/252 - Subtract the two like fractions:
90/252 - 294/252 = 90 - 294/252 = -204/252 - After reducing the fraction, the answer is -17/21
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