Subtract 50/35 from 81/90
1st number: 81/90, 2nd number: 1 15/35
81/90 - 50/35 is -37/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 35 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
81/90 = 81 × 7/90 × 7 = 567/630 - Likewise, for the 2nd fraction, since 35 × 18 = 630,
50/35 = 50 × 18/35 × 18 = 900/630 - Subtract the two like fractions:
567/630 - 900/630 = 567 - 900/630 = -333/630 - After reducing the fraction, the answer is -37/70
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Related: 81/90-50/70