Subtract 42/7 from 30/84
1st number: 30/84, 2nd number: 6 0/7
30/84 - 42/7 is -79/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
30/84 = 30 × 1/84 × 1 = 30/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
42/7 = 42 × 12/7 × 12 = 504/84 - Subtract the two like fractions:
30/84 - 504/84 = 30 - 504/84 = -474/84 - After reducing the fraction, the answer is -79/14
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