Subtract 18/28 from 45/20
1st number: 2 5/20, 2nd number: 18/28
45/20 - 18/28 is 45/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
18/28 = 18 × 5/28 × 5 = 90/140 - Subtract the two like fractions:
315/140 - 90/140 = 315 - 90/140 = 225/140 - After reducing the fraction, the answer is 45/28
- In mixed form: 117/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-18/28 45/20-36/28 45/40-18/28 45/20-18/56 45/20-54/28 45/60-18/28 45/20-18/84 45/20-90/28