Subtract 1/20 from 90/12
1st number: 7 6/12, 2nd number: 1/20
90/12 - 1/20 is 149/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
1/20 = 1 × 3/20 × 3 = 3/60 - Subtract the two like fractions:
450/60 - 3/60 = 450 - 3/60 = 447/60 - After reducing the fraction, the answer is 149/20
- In mixed form: 79/20
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