Add 9/20 and 81/42
1st number: 9/20, 2nd number: 1 39/42
9/20 + 81/42 is 333/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
9/20 = 9 × 21/20 × 21 = 189/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
81/42 = 81 × 10/42 × 10 = 810/420 - Add the two like fractions:
189/420 + 810/420 = 189 + 810/420 = 999/420 - 999/420 simplified gives 333/140
- So, 9/20 + 81/42 = 333/140
In mixed form: 253/140
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