Subtract 70/63 from 20/40
1st number: 20/40, 2nd number: 1 7/63
20/40 - 70/63 is -11/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
20/40 = 20 × 63/40 × 63 = 1260/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
70/63 = 70 × 40/63 × 40 = 2800/2520 - Subtract the two like fractions:
1260/2520 - 2800/2520 = 1260 - 2800/2520 = -1540/2520 - After reducing the fraction, the answer is -11/18
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