Subtract 21/80 from 90/28
1st number: 3 6/28, 2nd number: 21/80
90/28 - 21/80 is 1653/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 28 × 20 = 560,
90/28 = 90 × 20/28 × 20 = 1800/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
21/80 = 21 × 7/80 × 7 = 147/560 - Subtract the two like fractions:
1800/560 - 147/560 = 1800 - 147/560 = 1653/560 - In mixed form: 2533/560
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