Add 15/90 and 81/16
1st number: 15/90, 2nd number: 5 1/16
15/90 + 81/16 is 251/48.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 16 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
15/90 = 15 × 8/90 × 8 = 120/720 - Likewise, for the 2nd fraction, since 16 × 45 = 720,
81/16 = 81 × 45/16 × 45 = 3645/720 - Add the two like fractions:
120/720 + 3645/720 = 120 + 3645/720 = 3765/720 - 3765/720 simplified gives 251/48
- So, 15/90 + 81/16 = 251/48
In mixed form: 511/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90+81/16 15/90+81/32 45/90+81/16 15/90+81/48 75/90+81/16 15/90+81/80