Solutions by everydaycalculation.com

945 + 342 is 1970.

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

LCM of 45 and 42 is**630**

Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,

945 = 9 × 1445 × 14 = 126630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,

342 = 3 × 1542 × 15 = 45630 - Add the two like fractions:

126630 + 45630 = 126 + 45630 = 171630 - 171/630 simplified gives 1970
- So, 9/45 + 3/42 = 19/70

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