Subtract 90/50 from 10/21
1st number: 10/21, 2nd number: 1 40/50
10/21 - 90/50 is -139/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
10/21 = 10 × 50/21 × 50 = 500/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
90/50 = 90 × 21/50 × 21 = 1890/1050 - Subtract the two like fractions:
500/1050 - 1890/1050 = 500 - 1890/1050 = -1390/1050 - After reducing the fraction, the answer is -139/105
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