Add 28/90 and 45/20
1st number: 28/90, 2nd number: 2 5/20
28/90 + 45/20 is 461/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
28/90 = 28 × 2/90 × 2 = 56/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
45/20 = 45 × 9/20 × 9 = 405/180 - Add the two like fractions:
56/180 + 405/180 = 56 + 405/180 = 461/180 - So, 28/90 + 45/20 = 461/180
In mixed form: 2101/180
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