Add 15/56 and 80/90
15/56 + 80/90 is 583/504.
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,
15/56 = 15 × 45/56 × 45 = 675/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
80/90 = 80 × 28/90 × 28 = 2240/2520 - Add the two like fractions:
675/2520 + 2240/2520 = 675 + 2240/2520 = 2915/2520 - 2915/2520 simplified gives 583/504
- So, 15/56 + 80/90 = 583/504
In mixed form: 179/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/56+80/90 45/56+80/90 75/56+80/90