Subtract 4/80 from 21/7
1st number: 3 0/7, 2nd number: 4/80
21/7 - 4/80 is 59/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
21/7 = 21 × 80/7 × 80 = 1680/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
4/80 = 4 × 7/80 × 7 = 28/560 - Subtract the two like fractions:
1680/560 - 28/560 = 1680 - 28/560 = 1652/560 - After reducing the fraction, the answer is 59/20
- In mixed form: 219/20
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