Solutions by everydaycalculation.com

78 + 1260 is 4340.

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

LCM of 8 and 60 is**120**

Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,

78 = 7 × 158 × 15 = 105120 - Likewise, for the 2nd fraction, since 60 × 2 = 120,

1260 = 12 × 260 × 2 = 24120 - Add the two like fractions:

105120 + 24120 = 105 + 24120 = 129120 - 129/120 simplified gives 4340
- So, 7/8 + 12/60 = 43/40

In mixed form: 1340

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