Add 20/84 and 4/80
20/84 + 4/80 is 121/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 84 × 20 = 1680,
20/84 = 20 × 20/84 × 20 = 400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
4/80 = 4 × 21/80 × 21 = 84/1680 - Add the two like fractions:
400/1680 + 84/1680 = 400 + 84/1680 = 484/1680 - 484/1680 simplified gives 121/420
- So, 20/84 + 4/80 = 121/420
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