Subtract 70/63 from 42/48
1st number: 42/48, 2nd number: 1 7/63
42/48 - 70/63 is -17/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 63 is 1008
Next, find the equivalent fraction of both fractional numbers with denominator 1008 - For the 1st fraction, since 48 × 21 = 1008,
42/48 = 42 × 21/48 × 21 = 882/1008 - Likewise, for the 2nd fraction, since 63 × 16 = 1008,
70/63 = 70 × 16/63 × 16 = 1120/1008 - Subtract the two like fractions:
882/1008 - 1120/1008 = 882 - 1120/1008 = -238/1008 - After reducing the fraction, the answer is -17/72
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