Add 21/54 and 42/84
21/54 + 42/84 is 8/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 54 × 14 = 756,
21/54 = 21 × 14/54 × 14 = 294/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
42/84 = 42 × 9/84 × 9 = 378/756 - Add the two like fractions:
294/756 + 378/756 = 294 + 378/756 = 672/756 - 672/756 simplified gives 8/9
- So, 21/54 + 42/84 = 8/9
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