Subtract 16/20 from 40/18
1st number: 2 4/18, 2nd number: 16/20
40/18 - 16/20 is 64/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
40/18 = 40 × 10/18 × 10 = 400/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
16/20 = 16 × 9/20 × 9 = 144/180 - Subtract the two like fractions:
400/180 - 144/180 = 400 - 144/180 = 256/180 - After reducing the fraction, the answer is 64/45
- In mixed form: 119/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-16/20 40/18-32/20 40/36-16/20 40/18-16/40 40/18-48/20 40/54-16/20 40/18-16/60 40/18-80/20 40/90-16/20