Subtract 27/21 from 25/30
1st number: 25/30, 2nd number: 1 6/21
25/30 - 27/21 is -19/42.
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,
25/30 = 25 × 7/30 × 7 = 175/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
27/21 = 27 × 10/21 × 10 = 270/210 - Subtract the two like fractions:
175/210 - 270/210 = 175 - 270/210 = -95/210 - After reducing the fraction, the answer is -19/42
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