Add 1/72 and 3/21
1/72 + 3/21 is 79/504.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
1/72 = 1 × 7/72 × 7 = 7/504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
3/21 = 3 × 24/21 × 24 = 72/504 - Add the two like fractions:
7/504 + 72/504 = 7 + 72/504 = 79/504 - So, 1/72 + 3/21 = 79/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/72+3/21 1/72+6/21 1/72+3/42 3/72+3/21 1/72+9/21 1/72+3/63 5/72+3/21 1/72+15/21 7/72+3/21