Add 20/15 and 81/16
1st number: 1 5/15, 2nd number: 5 1/16
20/15 + 81/16 is 307/48.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
20/15 = 20 × 16/15 × 16 = 320/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
81/16 = 81 × 15/16 × 15 = 1215/240 - Add the two like fractions:
320/240 + 1215/240 = 320 + 1215/240 = 1535/240 - 1535/240 simplified gives 307/48
- So, 20/15 + 81/16 = 307/48
In mixed form: 619/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+81/16 20/30+81/16 20/15+81/32 60/15+81/16 20/45+81/16 20/15+81/48 20/75+81/16 20/15+81/80