Subtract 20/18 from 30/70
1st number: 30/70, 2nd number: 1 2/18
30/70 - 20/18 is -43/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
30/70 = 30 × 9/70 × 9 = 270/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
20/18 = 20 × 35/18 × 35 = 700/630 - Subtract the two like fractions:
270/630 - 700/630 = 270 - 700/630 = -430/630 - After reducing the fraction, the answer is -43/63
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