Subtract 15/21 from 72/5
1st number: 14 2/5, 2nd number: 15/21
72/5 - 15/21 is 479/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
72/5 = 72 × 21/5 × 21 = 1512/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
15/21 = 15 × 5/21 × 5 = 75/105 - Subtract the two like fractions:
1512/105 - 75/105 = 1512 - 75/105 = 1437/105 - After reducing the fraction, the answer is 479/35
- In mixed form: 1324/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/5-30/21 72/10-15/21 72/5-15/42 72/5-45/21 72/15-15/21 72/5-15/63 72/5-75/21 72/25-15/21 72/35-15/21