Add 20/80 and 30/81
20/80 + 30/81 is 67/108.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 80 × 81 = 6480,
20/80 = 20 × 81/80 × 81 = 1620/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
30/81 = 30 × 80/81 × 80 = 2400/6480 - Add the two like fractions:
1620/6480 + 2400/6480 = 1620 + 2400/6480 = 4020/6480 - 4020/6480 simplified gives 67/108
- So, 20/80 + 30/81 = 67/108
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