Subtract 40/21 from 27/30
1st number: 27/30, 2nd number: 1 19/21
27/30 - 40/21 is -211/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 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 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Subtract the two like fractions:
189/210 - 400/210 = 189 - 400/210 = -211/210
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