Add 81/4 and 3/15
1st number: 20 1/4, 2nd number: 3/15
81/4 + 3/15 is 409/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
81/4 = 81 × 15/4 × 15 = 1215/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
3/15 = 3 × 4/15 × 4 = 12/60 - Add the two like fractions:
1215/60 + 12/60 = 1215 + 12/60 = 1227/60 - 1227/60 simplified gives 409/20
- So, 81/4 + 3/15 = 409/20
In mixed form: 209/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+6/15 81/8+3/15 81/4+3/30 81/4+9/15 81/12+3/15 81/4+3/45 81/20+3/15 81/4+3/75 81/4+21/15 81/28+3/15