Subtract 30/12 from 20/72
1st number: 20/72, 2nd number: 2 6/12
20/72 - 30/12 is -20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 12 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
20/72 = 20 × 1/72 × 1 = 20/72 - Likewise, for the 2nd fraction, since 12 × 6 = 72,
30/12 = 30 × 6/12 × 6 = 180/72 - Subtract the two like fractions:
20/72 - 180/72 = 20 - 180/72 = -160/72 - After reducing the fraction, the answer is -20/9
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