Add 1/81 and 20/40
1/81 + 20/40 is 83/162.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
1/81 = 1 × 40/81 × 40 = 40/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
20/40 = 20 × 81/40 × 81 = 1620/3240 - Add the two like fractions:
40/3240 + 1620/3240 = 40 + 1620/3240 = 1660/3240 - 1660/3240 simplified gives 83/162
- So, 1/81 + 20/40 = 83/162
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