Subtract 20/84 from 80/21
1st number: 3 17/21, 2nd number: 20/84
80/21 - 20/84 is 25/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
80/21 = 80 × 4/21 × 4 = 320/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Subtract the two like fractions:
320/84 - 20/84 = 320 - 20/84 = 300/84 - After reducing the fraction, the answer is 25/7
- In mixed form: 34/7
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