Subtract 70/63 from 42/72
1st number: 42/72, 2nd number: 1 7/63
42/72 - 70/63 is -19/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
42/72 = 42 × 7/72 × 7 = 294/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
70/63 = 70 × 8/63 × 8 = 560/504 - Subtract the two like fractions:
294/504 - 560/504 = 294 - 560/504 = -266/504 - After reducing the fraction, the answer is -19/36
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