Subtract 20/18 from 28/75
1st number: 28/75, 2nd number: 1 2/18
28/75 - 20/18 is -166/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
28/75 = 28 × 6/75 × 6 = 168/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
20/18 = 20 × 25/18 × 25 = 500/450 - Subtract the two like fractions:
168/450 - 500/450 = 168 - 500/450 = -332/450 - After reducing the fraction, the answer is -166/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/75-20/18 28/75-40/18 28/75-20/36 84/75-20/18 28/75-60/18 28/75-20/54 28/75-20/90