Add 81/4 and 16/15
1st number: 20 1/4, 2nd number: 1 1/15
81/4 + 16/15 is 1279/60.
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,
16/15 = 16 × 4/15 × 4 = 64/60 - Add the two like fractions:
1215/60 + 64/60 = 1215 + 64/60 = 1279/60 - So, 81/4 + 16/15 = 1279/60
In mixed form: 2119/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/4+32/15 81/8+16/15 81/4+16/30 81/4+48/15 81/12+16/15 81/4+16/45 81/4+80/15 81/20+16/15 81/4+16/75 81/28+16/15