Subtract 30/7 from 84/42
1st number: 2 0/42, 2nd number: 4 2/7
84/42 - 30/7 is -16/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
84/42 = 84 × 1/42 × 1 = 84/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
30/7 = 30 × 6/7 × 6 = 180/42 - Subtract the two like fractions:
84/42 - 180/42 = 84 - 180/42 = -96/42 - After reducing the fraction, the answer is -16/7
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