Subtract 28/81 from 7/15
7/15 - 28/81 is 49/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 15 × 27 = 405,
7/15 = 7 × 27/15 × 27 = 189/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
28/81 = 28 × 5/81 × 5 = 140/405 - Subtract the two like fractions:
189/405 - 140/405 = 189 - 140/405 = 49/405
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