Subtract 20/45 from 81/24
1st number: 3 9/24, 2nd number: 20/45
81/24 - 20/45 is 211/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 24 × 15 = 360,
81/24 = 81 × 15/24 × 15 = 1215/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360 - Subtract the two like fractions:
1215/360 - 160/360 = 1215 - 160/360 = 1055/360 - After reducing the fraction, the answer is 211/72
- In mixed form: 267/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/24-40/45 81/48-20/45 81/24-20/90 81/24-60/45 81/72-20/45