Subtract 21/90 from 27/80
27/80 - 21/90 is 5/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
27/80 = 27 × 9/80 × 9 = 243/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
21/90 = 21 × 8/90 × 8 = 168/720 - Subtract the two like fractions:
243/720 - 168/720 = 243 - 168/720 = 75/720 - After reducing the fraction, the answer is 5/48
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