Subtract 28/16 from 45/28
1st number: 1 17/28, 2nd number: 1 12/16
45/28 - 28/16 is -1/7.
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,
45/28 = 45 × 4/28 × 4 = 180/112 - Likewise, for the 2nd fraction, since 16 × 7 = 112,
28/16 = 28 × 7/16 × 7 = 196/112 - Subtract the two like fractions:
180/112 - 196/112 = 180 - 196/112 = -16/112 - After reducing the fraction, the answer is -1/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28-28/16 45/28-56/16 45/56-28/16 45/28-28/32 45/28-84/16 45/84-28/16 45/28-28/48 45/28-28/80