Subtract 21/7 from 6/80
1st number: 6/80, 2nd number: 3 0/7
6/80 - 21/7 is -117/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
6/80 = 6 × 7/80 × 7 = 42/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
21/7 = 21 × 80/7 × 80 = 1680/560 - Subtract the two like fractions:
42/560 - 1680/560 = 42 - 1680/560 = -1638/560 - After reducing the fraction, the answer is -117/40
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