Subtract 90/14 from 63/21
1st number: 3 0/21, 2nd number: 6 6/14
63/21 - 90/14 is -24/7.
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,
63/21 = 63 × 2/21 × 2 = 126/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
90/14 = 90 × 3/14 × 3 = 270/42 - Subtract the two like fractions:
126/42 - 270/42 = 126 - 270/42 = -144/42 - After reducing the fraction, the answer is -24/7
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