Subtract 45/7 from 45/28
1st number: 1 17/28, 2nd number: 6 3/7
45/28 - 45/7 is -135/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
45/28 = 45 × 1/28 × 1 = 45/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
45/7 = 45 × 4/7 × 4 = 180/28 - Subtract the two like fractions:
45/28 - 180/28 = 45 - 180/28 = -135/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28-45/7 45/28-90/7 45/56-45/7 45/28-45/14 45/84-45/7 45/28-45/21 45/28-45/35 45/28-45/49