Add 21/36 and 81/15
1st number: 21/36, 2nd number: 5 6/15
21/36 + 81/15 is 359/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 15 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Likewise, for the 2nd fraction, since 15 × 12 = 180,
81/15 = 81 × 12/15 × 12 = 972/180 - Add the two like fractions:
105/180 + 972/180 = 105 + 972/180 = 1077/180 - 1077/180 simplified gives 359/60
- So, 21/36 + 81/15 = 359/60
In mixed form: 559/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+81/15 21/72+81/15 21/36+81/30 63/36+81/15 21/36+81/45 21/36+81/75