Add 81/90 and 35/56
81/90 + 35/56 is 61/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
81/90 = 81 × 28/90 × 28 = 2268/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
35/56 = 35 × 45/56 × 45 = 1575/2520 - Add the two like fractions:
2268/2520 + 1575/2520 = 2268 + 1575/2520 = 3843/2520 - 3843/2520 simplified gives 61/40
- So, 81/90 + 35/56 = 61/40
In mixed form: 121/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/90+70/56