Subtract 2/20 from 80/21
1st number: 3 17/21, 2nd number: 2/20
80/21 - 2/20 is 779/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
80/21 = 80 × 20/21 × 20 = 1600/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
2/20 = 2 × 21/20 × 21 = 42/420 - Subtract the two like fractions:
1600/420 - 42/420 = 1600 - 42/420 = 1558/420 - After reducing the fraction, the answer is 779/210
- In mixed form: 3149/210
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