Subtract 5/81 from 7/45
7/45 - 5/81 is 38/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
7/45 = 7 × 9/45 × 9 = 63/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
5/81 = 5 × 5/81 × 5 = 25/405 - Subtract the two like fractions:
63/405 - 25/405 = 63 - 25/405 = 38/405
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