Add 81/4 and 18/90
1st number: 20 1/4, 2nd number: 18/90
81/4 + 18/90 is 409/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
81/4 = 81 × 45/4 × 45 = 3645/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
18/90 = 18 × 2/90 × 2 = 36/180 - Add the two like fractions:
3645/180 + 36/180 = 3645 + 36/180 = 3681/180 - 3681/180 simplified gives 409/20
- So, 81/4 + 18/90 = 409/20
In mixed form: 209/20
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