Subtract 9/21 from 45/80
45/80 - 9/21 is 15/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
45/80 = 45 × 21/80 × 21 = 945/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
9/21 = 9 × 80/21 × 80 = 720/1680 - Subtract the two like fractions:
945/1680 - 720/1680 = 945 - 720/1680 = 225/1680 - After reducing the fraction, the answer is 15/112
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