Add 81/56 and 10/90
1st number: 1 25/56, 2nd number: 10/90
81/56 + 10/90 is 785/504.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
81/56 = 81 × 45/56 × 45 = 3645/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
10/90 = 10 × 28/90 × 28 = 280/2520 - Add the two like fractions:
3645/2520 + 280/2520 = 3645 + 280/2520 = 3925/2520 - 3925/2520 simplified gives 785/504
- So, 81/56 + 10/90 = 785/504
In mixed form: 1281/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/56+20/90 81/56+30/90 81/56+50/90 81/56+70/90