Subtract 30/81 from 7/5
1st number: 1 2/5, 2nd number: 30/81
7/5 - 30/81 is 139/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
7/5 = 7 × 81/5 × 81 = 567/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
30/81 = 30 × 5/81 × 5 = 150/405 - Subtract the two like fractions:
567/405 - 150/405 = 567 - 150/405 = 417/405 - After reducing the fraction, the answer is 139/135
- In mixed form: 14/135
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