Add 5/20 and 70/81
5/20 + 70/81 is 361/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
5/20 = 5 × 81/20 × 81 = 405/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
70/81 = 70 × 20/81 × 20 = 1400/1620 - Add the two like fractions:
405/1620 + 1400/1620 = 405 + 1400/1620 = 1805/1620 - 1805/1620 simplified gives 361/324
- So, 5/20 + 70/81 = 361/324
In mixed form: 137/324
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