To solve this expression, we need to add the three numbers together:
0.45 + 11/20 + 5/4
To add fractions, we need to find a common denominator. In this case, the common denominator is 20.
Converting the first number to a fraction with the denominator of 20:
0.45 = 45/100 = 9/20
Now we can add the fractions:
9/20 + 11/20 + 5/4
Since the denominators are all the same, we can simply add the numerators:
(9 + 11 + 25) / 20
= 45/20
Simplifying the fraction by dividing both numerator and denominator by 5:
45/20 = 9/4
The final answer is 9/4.
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