Add 42/54 and 21/80
42/54 + 21/80 is 749/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 80 is 2160
Next, find the equivalent fraction of both fractional numbers with denominator 2160 - For the 1st fraction, since 54 × 40 = 2160,
42/54 = 42 × 40/54 × 40 = 1680/2160 - Likewise, for the 2nd fraction, since 80 × 27 = 2160,
21/80 = 21 × 27/80 × 27 = 567/2160 - Add the two like fractions:
1680/2160 + 567/2160 = 1680 + 567/2160 = 2247/2160 - 2247/2160 simplified gives 749/720
- So, 42/54 + 21/80 = 749/720
In mixed form: 129/720
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