Subtract 12/30 from 6/21
6/21 - 12/30 is -4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
12/30 = 12 × 7/30 × 7 = 84/210 - Subtract the two like fractions:
60/210 - 84/210 = 60 - 84/210 = -24/210 - After reducing the fraction, the answer is -4/35
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