Subtract 15/80 from 21/54
21/54 - 15/80 is 29/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 54 × 40 = 2160,
21/54 = 21 × 40/54 × 40 = 840/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
15/80 = 15 × 27/80 × 27 = 405/2160 - Subtract the two like fractions:
840/2160 - 405/2160 = 840 - 405/2160 = 435/2160 - After reducing the fraction, the answer is 29/144
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