Add 21/49 and 7/20
21/49 + 7/20 is 109/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 20 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 49 × 20 = 980,
21/49 = 21 × 20/49 × 20 = 420/980 - Likewise, for the 2nd fraction, since 20 × 49 = 980,
7/20 = 7 × 49/20 × 49 = 343/980 - Add the two like fractions:
420/980 + 343/980 = 420 + 343/980 = 763/980 - 763/980 simplified gives 109/140
- So, 21/49 + 7/20 = 109/140
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