Solutions by everydaycalculation.com

315 + 2198 is 2970.

- Find the least common denominator or LCM of the two denominators:

LCM of 15 and 98 is**1470**

Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 15 × 98 = 1470,

315 = 3 × 9815 × 98 = 2941470 - Likewise, for the 2nd fraction, since 98 × 15 = 1470,

2198 = 21 × 1598 × 15 = 3151470 - Add the two like fractions:

2941470 + 3151470 = 294 + 3151470 = 6091470 - 609/1470 simplified gives 2970
- So, 3/15 + 21/98 = 29/70

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