Subtract 30/18 from 20/7
1st number: 2 6/7, 2nd number: 1 12/18
20/7 - 30/18 is 25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
20/7 = 20 × 18/7 × 18 = 360/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Subtract the two like fractions:
360/126 - 210/126 = 360 - 210/126 = 150/126 - After reducing the fraction, the answer is 25/21
- In mixed form: 14/21
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