Subtract 16/9 from 20/28
1st number: 20/28, 2nd number: 1 7/9
20/28 - 16/9 is -67/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
16/9 = 16 × 28/9 × 28 = 448/252 - Subtract the two like fractions:
180/252 - 448/252 = 180 - 448/252 = -268/252 - After reducing the fraction, the answer is -67/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28-16/9 20/28-32/9 20/56-16/9 20/28-16/18 60/28-16/9 20/28-48/9 20/84-16/9 20/28-16/27 20/28-80/9 20/28-16/45 20/28-16/63