Subtract 90/21 from 3/84
1st number: 3/84, 2nd number: 4 6/21
3/84 - 90/21 is -17/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
3/84 = 3 × 1/84 × 1 = 3/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
90/21 = 90 × 4/21 × 4 = 360/84 - Subtract the two like fractions:
3/84 - 360/84 = 3 - 360/84 = -357/84 - After reducing the fraction, the answer is -17/4
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