Add 21/7 and 75/72
1st number: 3 0/7, 2nd number: 1 3/72
21/7 + 75/72 is 97/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 7 × 72 = 504,
21/7 = 21 × 72/7 × 72 = 1512/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
75/72 = 75 × 7/72 × 7 = 525/504 - Add the two like fractions:
1512/504 + 525/504 = 1512 + 525/504 = 2037/504 - 2037/504 simplified gives 97/24
- So, 21/7 + 75/72 = 97/24
In mixed form: 41/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+75/72 21/14+75/72 63/7+75/72 21/35+75/72 21/49+75/72