Answer:
1/2 is less than
Step-by-step explanation: 1/2 is only 50% while 4/5 is 80%
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The number of points Marco needs to bring his average up to 90% is 15points.
If there's a possible 25 possible points, and Marco has taken 5 quizzes;
Evidently, each quiz has weighs 5 points.
Mathematically;

- 2100 + 500x = 2250 + 450x
x = 3.
Therefore, he needs 5x points = 15 points to bring his average up to 90%.
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Answer:
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Step-by-step explanation:
Okay so the income tax minus the deductions will come to:
26,800 - 5,500 = 21,300
So remaining tax is 21,300.
To show that he paid 15% of it, we do:
15/100 (21300) = 3,195
So he already paid $3,195 of his income tax.