Add 20/84 and 80/20
1st number: 20/84, 2nd number: 4 0/20
20/84 + 80/20 is 89/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
80/20 = 80 × 21/20 × 21 = 1680/420 - Add the two like fractions:
100/420 + 1680/420 = 100 + 1680/420 = 1780/420 - 1780/420 simplified gives 89/21
- So, 20/84 + 80/20 = 89/21
In mixed form: 45/21
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