Add 75/21 and 3/72
1st number: 3 12/21, 2nd number: 3/72
75/21 + 3/72 is 607/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
75/21 = 75 × 24/21 × 24 = 1800/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504 - Add the two like fractions:
1800/504 + 21/504 = 1800 + 21/504 = 1821/504 - 1821/504 simplified gives 607/168
- So, 75/21 + 3/72 = 607/168
In mixed form: 3103/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21+6/72 75/42+3/72 75/21+9/72 75/63+3/72 75/21+15/72 75/21+21/72