Add 42/49 and 20/40
42/49 + 20/40 is 19/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 49 × 40 = 1960,
42/49 = 42 × 40/49 × 40 = 1680/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
20/40 = 20 × 49/40 × 49 = 980/1960 - Add the two like fractions:
1680/1960 + 980/1960 = 1680 + 980/1960 = 2660/1960 - 2660/1960 simplified gives 19/14
- So, 42/49 + 20/40 = 19/14
In mixed form: 15/14
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