Subtract 45/7 from 40/28
1st number: 1 12/28, 2nd number: 6 3/7
40/28 - 45/7 is -5/1.
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,
40/28 = 40 × 1/28 × 1 = 40/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
45/7 = 45 × 4/7 × 4 = 180/28 - Subtract the two like fractions:
40/28 - 180/28 = 40 - 180/28 = -140/28 - After reducing the fraction, the answer is -5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28-45/7 40/28-90/7 40/56-45/7 40/28-45/14 40/84-45/7 40/28-45/21 40/28-45/35 40/28-45/49