Add 21/20 and 63/84
1st number: 1 1/20, 2nd number: 63/84
21/20 + 63/84 is 9/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
21/20 = 21 × 21/20 × 21 = 441/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
63/84 = 63 × 5/84 × 5 = 315/420 - Add the two like fractions:
441/420 + 315/420 = 441 + 315/420 = 756/420 - 756/420 simplified gives 9/5
- So, 21/20 + 63/84 = 9/5
In mixed form: 14/5
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