Subtract 50/21 from 84/90
1st number: 84/90, 2nd number: 2 8/21
84/90 - 50/21 is -152/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
84/90 = 84 × 7/90 × 7 = 588/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
50/21 = 50 × 30/21 × 30 = 1500/630 - Subtract the two like fractions:
588/630 - 1500/630 = 588 - 1500/630 = -912/630 - After reducing the fraction, the answer is -152/105
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