Subtract 4/21 from 90/6
1st number: 15 0/6, 2nd number: 4/21
90/6 - 4/21 is 311/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
4/21 = 4 × 2/21 × 2 = 8/42 - Subtract the two like fractions:
630/42 - 8/42 = 630 - 8/42 = 622/42 - After reducing the fraction, the answer is 311/21
- In mixed form: 1417/21
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