Subtract 9/7 from 20/28
1st number: 20/28, 2nd number: 1 2/7
20/28 - 9/7 is -4/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
20/28 = 20 × 1/28 × 1 = 20/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
9/7 = 9 × 4/7 × 4 = 36/28 - Subtract the two like fractions:
20/28 - 36/28 = 20 - 36/28 = -16/28 - After reducing the fraction, the answer is -4/7
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