Subtract 21/72 from 15/5
1st number: 3 0/5, 2nd number: 21/72
15/5 - 21/72 is 65/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
15/5 = 15 × 72/5 × 72 = 1080/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Subtract the two like fractions:
1080/360 - 105/360 = 1080 - 105/360 = 975/360 - After reducing the fraction, the answer is 65/24
- In mixed form: 217/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-21/72 15/5-42/72 15/10-21/72 45/5-21/72 15/5-63/72 75/5-21/72 15/25-21/72 15/35-21/72