Subtract 18/9 from 28/70
1st number: 28/70, 2nd number: 2 0/9
28/70 - 18/9 is -8/5.
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,
28/70 = 28 × 9/70 × 9 = 252/630 - Likewise, for the 2nd fraction, since 9 × 70 = 630,
18/9 = 18 × 70/9 × 70 = 1260/630 - Subtract the two like fractions:
252/630 - 1260/630 = 252 - 1260/630 = -1008/630 - After reducing the fraction, the answer is -8/5
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