Subtract 70/63 from 18/20
1st number: 18/20, 2nd number: 1 7/63
18/20 - 70/63 is -19/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
70/63 = 70 × 20/63 × 20 = 1400/1260 - Subtract the two like fractions:
1134/1260 - 1400/1260 = 1134 - 1400/1260 = -266/1260 - After reducing the fraction, the answer is -19/90
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