Subtract 20/56 from 18/45
18/45 - 20/56 is 3/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 45 × 56 = 2520,
18/45 = 18 × 56/45 × 56 = 1008/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
20/56 = 20 × 45/56 × 45 = 900/2520 - Subtract the two like fractions:
1008/2520 - 900/2520 = 1008 - 900/2520 = 108/2520 - After reducing the fraction, the answer is 3/70
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