Subtract 20/90 from 81/6
1st number: 13 3/6, 2nd number: 20/90
81/6 - 20/90 is 239/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 6 × 15 = 90,
81/6 = 81 × 15/6 × 15 = 1215/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Subtract the two like fractions:
1215/90 - 20/90 = 1215 - 20/90 = 1195/90 - After reducing the fraction, the answer is 239/18
- In mixed form: 135/18
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