Subtract 80/81 from 9/15
9/15 - 80/81 is -157/405.
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,
9/15 = 9 × 27/15 × 27 = 243/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
80/81 = 80 × 5/81 × 5 = 400/405 - Subtract the two like fractions:
243/405 - 400/405 = 243 - 400/405 = -157/405
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