Add 30/81 and 18/80
30/81 + 18/80 is 643/1080.
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,
30/81 = 30 × 80/81 × 80 = 2400/6480 - Likewise, for the 2nd fraction, since 80 × 81 = 6480,
18/80 = 18 × 81/80 × 81 = 1458/6480 - Add the two like fractions:
2400/6480 + 1458/6480 = 2400 + 1458/6480 = 3858/6480 - 3858/6480 simplified gives 643/1080
- So, 30/81 + 18/80 = 643/1080
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