Solutions by everydaycalculation.com

2142 + 1030 is 56.

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

LCM of 42 and 30 is**210**

Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,

2142 = 21 × 542 × 5 = 105210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,

1030 = 10 × 730 × 7 = 70210 - Add the two like fractions:

105210 + 70210 = 105 + 70210 = 175210 - 175/210 simplified gives 56
- So, 21/42 + 10/30 = 5/6

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