Subtract 20/9 from 14/20, Solve 14/20

Subtract 20/9 from 14/20

1^st number: 14/20, 2^nd number: 2 2/9

14/20 - 20/9 is -137/90.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180

Next, find the equivalent fraction of both fractional numbers with denominator 180
For the 1st fraction, since 20 × 9 = 180,
14/20 = 14 × 9/20 × 9 = 126/180
Likewise, for the 2nd fraction, since 9 × 20 = 180,
20/9 = 20 × 20/9 × 20 = 400/180
Subtract the two like fractions:
126/180 - 400/180 = 126 - 400/180 = -274/180
After reducing the fraction, the answer is -137/90

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad