Subtract 90/28 from 1/21
1st number: 1/21, 2nd number: 3 6/28
1/21 - 90/28 is -19/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
90/28 = 90 × 3/28 × 3 = 270/84 - Subtract the two like fractions:
4/84 - 270/84 = 4 - 270/84 = -266/84 - After reducing the fraction, the answer is -19/6
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