Subtract 90/21 from 8/2
1st number: 4 0/2, 2nd number: 4 6/21
8/2 - 90/21 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
8/2 = 8 × 21/2 × 21 = 168/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
90/21 = 90 × 2/21 × 2 = 180/42 - Subtract the two like fractions:
168/42 - 180/42 = 168 - 180/42 = -12/42 - After reducing the fraction, the answer is -2/7
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