Subtract 49/50 from 21/90
21/90 - 49/50 is -56/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 50 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Likewise, for the 2nd fraction, since 50 × 9 = 450,
49/50 = 49 × 9/50 × 9 = 441/450 - Subtract the two like fractions:
105/450 - 441/450 = 105 - 441/450 = -336/450 - After reducing the fraction, the answer is -56/75
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