Subtract 3/80 from 90/21
1st number: 4 6/21, 2nd number: 3/80
90/21 - 3/80 is 2379/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
90/21 = 90 × 80/21 × 80 = 7200/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
3/80 = 3 × 21/80 × 21 = 63/1680 - Subtract the two like fractions:
7200/1680 - 63/1680 = 7200 - 63/1680 = 7137/1680 - After reducing the fraction, the answer is 2379/560
- In mixed form: 4139/560
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