Add 81/14 and 15/90
1st number: 5 11/14, 2nd number: 15/90
81/14 + 15/90 is 125/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 14 × 45 = 630,
81/14 = 81 × 45/14 × 45 = 3645/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Add the two like fractions:
3645/630 + 105/630 = 3645 + 105/630 = 3750/630 - 3750/630 simplified gives 125/21
- So, 81/14 + 15/90 = 125/21
In mixed form: 520/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/14+30/90 81/28+15/90 81/14+45/90 81/42+15/90 81/14+75/90 81/70+15/90 81/98+15/90