Subtract 90/40 from 20/14
1st number: 1 6/14, 2nd number: 2 10/40
20/14 - 90/40 is -23/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 14 × 20 = 280,
20/14 = 20 × 20/14 × 20 = 400/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
90/40 = 90 × 7/40 × 7 = 630/280 - Subtract the two like fractions:
400/280 - 630/280 = 400 - 630/280 = -230/280 - After reducing the fraction, the answer is -23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/14-90/40 20/28-90/40 20/14-90/80 60/14-90/40 20/42-90/40 20/70-90/40 20/98-90/40