Subtract 49/80 from 21/49
21/49 - 49/80 is -103/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 49 × 80 = 3920,
21/49 = 21 × 80/49 × 80 = 1680/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
49/80 = 49 × 49/80 × 49 = 2401/3920 - Subtract the two like fractions:
1680/3920 - 2401/3920 = 1680 - 2401/3920 = -721/3920 - After reducing the fraction, the answer is -103/560
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