Subtract 20/9 from 42/70
1st number: 42/70, 2nd number: 2 2/9
42/70 - 20/9 is -73/45.
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,
42/70 = 42 × 9/70 × 9 = 378/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
20/9 = 20 × 70/9 × 70 = 1400/630 - Subtract the two like fractions:
378/630 - 1400/630 = 378 - 1400/630 = -1022/630 - After reducing the fraction, the answer is -73/45
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