Subtract 80/14 from 90/21
1st number: 4 6/21, 2nd number: 5 10/14
90/21 - 80/14 is -10/7.
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,
90/21 = 90 × 2/21 × 2 = 180/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
80/14 = 80 × 3/14 × 3 = 240/42 - Subtract the two like fractions:
180/42 - 240/42 = 180 - 240/42 = -60/42 - After reducing the fraction, the answer is -10/7
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