Add 21/15 and 2/72
1st number: 1 6/15, 2nd number: 2/72
21/15 + 2/72 is 257/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
21/15 = 21 × 24/15 × 24 = 504/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
2/72 = 2 × 5/72 × 5 = 10/360 - Add the two like fractions:
504/360 + 10/360 = 504 + 10/360 = 514/360 - 514/360 simplified gives 257/180
- So, 21/15 + 2/72 = 257/180
In mixed form: 177/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15+2/72 21/15+4/72 21/30+2/72 63/15+2/72 21/15+6/72 21/45+2/72 21/15+10/72 21/75+2/72 21/15+14/72