Subtract 40/14 from 80/21
1st number: 3 17/21, 2nd number: 2 12/14
80/21 - 40/14 is 20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
80/21 = 80 × 2/21 × 2 = 160/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
40/14 = 40 × 3/14 × 3 = 120/42 - Subtract the two like fractions:
160/42 - 120/42 = 160 - 120/42 = 40/42 - After reducing the fraction, the answer is 20/21
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