Subtract 45/42 from 1/28
1st number: 1/28, 2nd number: 1 3/42
1/28 - 45/42 is -29/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
1/28 = 1 × 3/28 × 3 = 3/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
45/42 = 45 × 2/42 × 2 = 90/84 - Subtract the two like fractions:
3/84 - 90/84 = 3 - 90/84 = -87/84 - After reducing the fraction, the answer is -29/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28-45/42 1/28-90/42 1/56-45/42 1/28-45/84 3/28-45/42 1/84-45/42 5/28-45/42 7/28-45/42