Subtract 20/9 from 18/70
1st number: 18/70, 2nd number: 2 2/9
18/70 - 20/9 is -619/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
18/70 = 18 × 9/70 × 9 = 162/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
20/9 = 20 × 70/9 × 70 = 1400/630 - Subtract the two like fractions:
162/630 - 1400/630 = 162 - 1400/630 = -1238/630 - After reducing the fraction, the answer is -619/315
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