Add 20/81 and 30/80
20/81 + 30/80 is 403/648.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 80 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 81 × 80 = 6480,
20/81 = 20 × 80/81 × 80 = 1600/6480 - Likewise, for the 2nd fraction, since 80 × 81 = 6480,
30/80 = 30 × 81/80 × 81 = 2430/6480 - Add the two like fractions:
1600/6480 + 2430/6480 = 1600 + 2430/6480 = 4030/6480 - 4030/6480 simplified gives 403/648
- So, 20/81 + 30/80 = 403/648
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