Add 40/21 and 84/54
1st number: 1 19/21, 2nd number: 1 30/54
40/21 + 84/54 is 218/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
40/21 = 40 × 18/21 × 18 = 720/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
84/54 = 84 × 7/54 × 7 = 588/378 - Add the two like fractions:
720/378 + 588/378 = 720 + 588/378 = 1308/378 - 1308/378 simplified gives 218/63
- So, 40/21 + 84/54 = 218/63
In mixed form: 329/63
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