Subtract 18/40 from 90/7
1st number: 12 6/7, 2nd number: 18/40
90/7 - 18/40 is 1737/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
90/7 = 90 × 40/7 × 40 = 3600/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
18/40 = 18 × 7/40 × 7 = 126/280 - Subtract the two like fractions:
3600/280 - 126/280 = 3600 - 126/280 = 3474/280 - After reducing the fraction, the answer is 1737/140
- In mixed form: 1257/140
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