Subtract 45/54 from 40/20
1st number: 2 0/20, 2nd number: 45/54
40/20 - 45/54 is 7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 54 is 540
Next, find the equivalent fraction of both fractional numbers with denominator 540 - For the 1st fraction, since 20 × 27 = 540,
40/20 = 40 × 27/20 × 27 = 1080/540 - Likewise, for the 2nd fraction, since 54 × 10 = 540,
45/54 = 45 × 10/54 × 10 = 450/540 - Subtract the two like fractions:
1080/540 - 450/540 = 1080 - 450/540 = 630/540 - After reducing the fraction, the answer is 7/6
- In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/20-45/54 40/20-90/54 40/60-45/54