Subtract 70/15 from 7/81
1st number: 7/81, 2nd number: 4 10/15
7/81 - 70/15 is -371/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 15 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
7/81 = 7 × 5/81 × 5 = 35/405 - Likewise, for the 2nd fraction, since 15 × 27 = 405,
70/15 = 70 × 27/15 × 27 = 1890/405 - Subtract the two like fractions:
35/405 - 1890/405 = 35 - 1890/405 = -1855/405 - After reducing the fraction, the answer is -371/81
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