Subtract 70/42 from 54/63
1st number: 54/63, 2nd number: 1 28/42
54/63 - 70/42 is -17/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
54/63 = 54 × 2/63 × 2 = 108/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
70/42 = 70 × 3/42 × 3 = 210/126 - Subtract the two like fractions:
108/126 - 210/126 = 108 - 210/126 = -102/126 - After reducing the fraction, the answer is -17/21
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