Subtract 27/70 from 90/40
1st number: 2 10/40, 2nd number: 27/70
90/40 - 27/70 is 261/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
90/40 = 90 × 7/40 × 7 = 630/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
27/70 = 27 × 4/70 × 4 = 108/280 - Subtract the two like fractions:
630/280 - 108/280 = 630 - 108/280 = 522/280 - After reducing the fraction, the answer is 261/140
- In mixed form: 1121/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-54/70 90/80-27/70 90/40-81/70