Add 21/36 and 81/20
1st number: 21/36, 2nd number: 4 1/20
21/36 + 81/20 is 139/30.
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,
21/36 = 21 × 5/36 × 5 = 105/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Add the two like fractions:
105/180 + 729/180 = 105 + 729/180 = 834/180 - 834/180 simplified gives 139/30
- So, 21/36 + 81/20 = 139/30
In mixed form: 419/30
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