Subtract 28/45 from 40/20
1st number: 2 0/20, 2nd number: 28/45
40/20 - 28/45 is 62/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
40/20 = 40 × 9/20 × 9 = 360/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
28/45 = 28 × 4/45 × 4 = 112/180 - Subtract the two like fractions:
360/180 - 112/180 = 360 - 112/180 = 248/180 - After reducing the fraction, the answer is 62/45
- In mixed form: 117/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20-28/45 40/20-56/45 40/20-28/90 40/20-84/45 40/60-28/45