Subtract 63/56 from 20/45
1st number: 20/45, 2nd number: 1 7/56
20/45 - 63/56 is -49/72.
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,
20/45 = 20 × 56/45 × 56 = 1120/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
63/56 = 63 × 45/56 × 45 = 2835/2520 - Subtract the two like fractions:
1120/2520 - 2835/2520 = 1120 - 2835/2520 = -1715/2520 - After reducing the fraction, the answer is -49/72
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