Subtract 21/80 from 12/63
12/63 - 21/80 is -121/1680.
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,
12/63 = 12 × 80/63 × 80 = 960/5040 - Likewise, for the 2nd fraction, since 80 × 63 = 5040,
21/80 = 21 × 63/80 × 63 = 1323/5040 - Subtract the two like fractions:
960/5040 - 1323/5040 = 960 - 1323/5040 = -363/5040 - After reducing the fraction, the answer is -121/1680
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