Add 84/20 and 20/21
1st number: 4 4/20, 2nd number: 20/21
84/20 + 20/21 is 541/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
84/20 = 84 × 21/20 × 21 = 1764/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Add the two like fractions:
1764/420 + 400/420 = 1764 + 400/420 = 2164/420 - 2164/420 simplified gives 541/105
- So, 84/20 + 20/21 = 541/105
In mixed form: 516/105
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