Subtract 40/7 from 81/45
1st number: 1 36/45, 2nd number: 5 5/7
81/45 - 40/7 is -137/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
81/45 = 81 × 7/45 × 7 = 567/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
40/7 = 40 × 45/7 × 45 = 1800/315 - Subtract the two like fractions:
567/315 - 1800/315 = 567 - 1800/315 = -1233/315 - After reducing the fraction, the answer is -137/35
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