Subtract 21/5 from 70/63
1st number: 1 7/63, 2nd number: 4 1/5
70/63 - 21/5 is -139/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 5 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
70/63 = 70 × 5/63 × 5 = 350/315 - Likewise, for the 2nd fraction, since 5 × 63 = 315,
21/5 = 21 × 63/5 × 63 = 1323/315 - Subtract the two like fractions:
350/315 - 1323/315 = 350 - 1323/315 = -973/315 - After reducing the fraction, the answer is -139/45
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