Subtract 20/7 from 27/30
1st number: 27/30, 2nd number: 2 6/7
27/30 - 20/7 is -137/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
20/7 = 20 × 30/7 × 30 = 600/210 - Subtract the two like fractions:
189/210 - 600/210 = 189 - 600/210 = -411/210 - After reducing the fraction, the answer is -137/70
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