Subtract 30/16 from 20/28
1st number: 20/28, 2nd number: 1 14/16
20/28 - 30/16 is -65/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 16 is 112
Next, find the equivalent fraction of both fractional numbers with denominator 112 - For the 1st fraction, since 28 × 4 = 112,
20/28 = 20 × 4/28 × 4 = 80/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
30/16 = 30 × 7/16 × 7 = 210/112 - Subtract the two like fractions:
80/112 - 210/112 = 80 - 210/112 = -130/112 - After reducing the fraction, the answer is -65/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28-30/16 20/28-60/16 20/56-30/16 20/28-30/32 60/28-30/16 20/28-90/16 20/84-30/16 20/28-30/48 20/28-30/80