Add 81/36 and 21/20
1st number: 2 9/36, 2nd number: 1 1/20
81/36 + 21/20 is 33/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
81/36 = 81 × 5/36 × 5 = 405/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
21/20 = 21 × 9/20 × 9 = 189/180 - Add the two like fractions:
405/180 + 189/180 = 405 + 189/180 = 594/180 - 594/180 simplified gives 33/10
- So, 81/36 + 21/20 = 33/10
In mixed form: 33/10
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