Add 5/20 and 20/42, Solve 5/20 + 20/42 as a fraction

Add 5/20 and 20/42

5/20 + 20/42 is 61/84.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420
Likewise, for the 2nd fraction, since 42 × 10 = 420,
20/42 = 20 × 10/42 × 10 = 200/420
Add the two like fractions:
105/420 + 200/420 = 105 + 200/420 = 305/420
305/420 simplified gives 61/84
So, 5/20 + 20/42 = 61/84

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