Subtract 80/20 from 90/7
1st number: 12 6/7, 2nd number: 4 0/20
90/7 - 80/20 is 62/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
80/20 = 80 × 7/20 × 7 = 560/140 - Subtract the two like fractions:
1800/140 - 560/140 = 1800 - 560/140 = 1240/140 - After reducing the fraction, the answer is 62/7
- In mixed form: 86/7
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