Subtract 21/30 from 49/80
49/80 - 21/30 is -7/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 30 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
49/80 = 49 × 3/80 × 3 = 147/240 - Likewise, for the 2nd fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240 - Subtract the two like fractions:
147/240 - 168/240 = 147 - 168/240 = -21/240 - After reducing the fraction, the answer is -7/80
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