Subtract 72/81 from 4/5
4/5 - 72/81 is -4/45.
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,
4/5 = 4 × 81/5 × 81 = 324/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
72/81 = 72 × 5/81 × 5 = 360/405 - Subtract the two like fractions:
324/405 - 360/405 = 324 - 360/405 = -36/405 - After reducing the fraction, the answer is -4/45
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