Add 21/49 and 42/80
21/49 + 42/80 is 267/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 49 × 80 = 3920,
21/49 = 21 × 80/49 × 80 = 1680/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
42/80 = 42 × 49/80 × 49 = 2058/3920 - Add the two like fractions:
1680/3920 + 2058/3920 = 1680 + 2058/3920 = 3738/3920 - 3738/3920 simplified gives 267/280
- So, 21/49 + 42/80 = 267/280
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