Subtract 21/80 from 7/63
7/63 - 21/80 is -109/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 80 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 63 × 80 = 5040,
7/63 = 7 × 80/63 × 80 = 560/5040 - Likewise, for the 2nd fraction, since 80 × 63 = 5040,
21/80 = 21 × 63/80 × 63 = 1323/5040 - Subtract the two like fractions:
560/5040 - 1323/5040 = 560 - 1323/5040 = -763/5040 - After reducing the fraction, the answer is -109/720
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