Subtract 20/18 from 90/7
1st number: 12 6/7, 2nd number: 1 2/18
90/7 - 20/18 is 740/63.
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,
90/7 = 90 × 18/7 × 18 = 1620/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Subtract the two like fractions:
1620/126 - 140/126 = 1620 - 140/126 = 1480/126 - After reducing the fraction, the answer is 740/63
- In mixed form: 1147/63
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