Subtract 21/8 from 70/63
1st number: 1 7/63, 2nd number: 2 5/8
70/63 - 21/8 is -109/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
70/63 = 70 × 8/63 × 8 = 560/504 - Likewise, for the 2nd fraction, since 8 × 63 = 504,
21/8 = 21 × 63/8 × 63 = 1323/504 - Subtract the two like fractions:
560/504 - 1323/504 = 560 - 1323/504 = -763/504 - After reducing the fraction, the answer is -109/72
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