Add 40/21 and 10/72
1st number: 1 19/21, 2nd number: 10/72
40/21 + 10/72 is 515/252.
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,
40/21 = 40 × 24/21 × 24 = 960/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504 - Add the two like fractions:
960/504 + 70/504 = 960 + 70/504 = 1030/504 - 1030/504 simplified gives 515/252
- So, 40/21 + 10/72 = 515/252
In mixed form: 211/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+10/72 40/21+20/72 40/42+10/72 40/21+30/72 40/63+10/72 40/21+50/72 40/21+70/72