Subtract 80/45 from 21/84
1st number: 21/84, 2nd number: 1 35/45
21/84 - 80/45 is -55/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
21/84 = 21 × 15/84 × 15 = 315/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
80/45 = 80 × 28/45 × 28 = 2240/1260 - Subtract the two like fractions:
315/1260 - 2240/1260 = 315 - 2240/1260 = -1925/1260 - After reducing the fraction, the answer is -55/36
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