Solutions by everydaycalculation.com

1556 + 4090 is 359504.

- 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,

1556 = 15 × 4556 × 45 = 6752520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,

4090 = 40 × 2890 × 28 = 11202520 - Add the two like fractions:

6752520 + 11202520 = 675 + 11202520 = 17952520 - 1795/2520 simplified gives 359504
- So, 15/56 + 40/90 = 359/504

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