Add 81/15 and 90/16
1st number: 5 6/15, 2nd number: 5 10/16
81/15 + 90/16 is 441/40.
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,
81/15 = 81 × 16/15 × 16 = 1296/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
90/16 = 90 × 15/16 × 15 = 1350/240 - Add the two like fractions:
1296/240 + 1350/240 = 1296 + 1350/240 = 2646/240 - 2646/240 simplified gives 441/40
- So, 81/15 + 90/16 = 441/40
In mixed form: 111/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+90/16 81/15+90/32 81/45+90/16 81/15+90/48 81/75+90/16 81/15+90/80