Add 81/45 and 28/70
1st number: 1 36/45, 2nd number: 28/70
81/45 + 28/70 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
81/45 = 81 × 14/45 × 14 = 1134/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
28/70 = 28 × 9/70 × 9 = 252/630 - Add the two like fractions:
1134/630 + 252/630 = 1134 + 252/630 = 1386/630 - 1386/630 simplified gives 11/5
- So, 81/45 + 28/70 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/45+56/70 81/90+28/70 81/45+84/70