Add 20/42 and 21/4
1st number: 20/42, 2nd number: 5 1/4
20/42 + 21/4 is 481/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
21/4 = 21 × 21/4 × 21 = 441/84 - Add the two like fractions:
40/84 + 441/84 = 40 + 441/84 = 481/84 - So, 20/42 + 21/4 = 481/84
In mixed form: 561/84
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