Subtract 14/90 from 20/40
20/40 - 14/90 is 31/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
20/40 = 20 × 9/40 × 9 = 180/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
14/90 = 14 × 4/90 × 4 = 56/360 - Subtract the two like fractions:
180/360 - 56/360 = 180 - 56/360 = 124/360 - After reducing the fraction, the answer is 31/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/40-28/90 20/80-14/90 60/40-14/90 20/40-42/90 20/40-70/90 20/40-98/90