Subtract 30/20 from 30/28
1st number: 1 2/28, 2nd number: 1 10/20
30/28 - 30/20 is -3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140 - Subtract the two like fractions:
150/140 - 210/140 = 150 - 210/140 = -60/140 - After reducing the fraction, the answer is -3/7
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