Subtract 36/28 from 45/42
1st number: 1 3/42, 2nd number: 1 8/28
45/42 - 36/28 is -3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
45/42 = 45 × 2/42 × 2 = 90/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
36/28 = 36 × 3/28 × 3 = 108/84 - Subtract the two like fractions:
90/84 - 108/84 = 90 - 108/84 = -18/84 - After reducing the fraction, the answer is -3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42-36/28 45/42-72/28 45/84-36/28 45/42-36/56 45/42-36/84