Subtract 6/84 from 90/20
1st number: 4 10/20, 2nd number: 6/84
90/20 - 6/84 is 31/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
90/20 = 90 × 21/20 × 21 = 1890/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
6/84 = 6 × 5/84 × 5 = 30/420 - Subtract the two like fractions:
1890/420 - 30/420 = 1890 - 30/420 = 1860/420 - After reducing the fraction, the answer is 31/7
- In mixed form: 43/7
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