Add 72/21 and 5/25
1st number: 3 9/21, 2nd number: 5/25
72/21 + 5/25 is 127/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
72/21 = 72 × 25/21 × 25 = 1800/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
5/25 = 5 × 21/25 × 21 = 105/525 - Add the two like fractions:
1800/525 + 105/525 = 1800 + 105/525 = 1905/525 - 1905/525 simplified gives 127/35
- So, 72/21 + 5/25 = 127/35
In mixed form: 322/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+10/25 72/42+5/25 72/21+5/50 72/21+15/25 72/63+5/25 72/21+5/75 72/21+35/25