Subtract 1/6 from 90/21
1st number: 4 6/21, 2nd number: 1/6
90/21 - 1/6 is 173/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
90/21 = 90 × 2/21 × 2 = 180/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
1/6 = 1 × 7/6 × 7 = 7/42 - Subtract the two like fractions:
180/42 - 7/42 = 180 - 7/42 = 173/42 - In mixed form: 45/42
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