Question

a certain test is worth 135 points. how many points (rounded to the nearest point) are needed to obtain a score of 85%?

Answer 1

To obtain a score of 85% on a test worth 135 points, one needs to get 115 points. By using proportions, we get the required value.

How to write proportions?

A proportion is defined as an equality between two ratios.

Consider two ratios a:b and c:d. Then, the proportion we can write,

a: b = c : d

Then, the simplification we have for this proportion is

a/b = c/d or ad = bc

Calculation:

It is given that, a certain test is worth 135 points.

One to get 85% on this test, he/she needs to get X number of points.

So, we can write the proportions as

X : 135 = 85 : 100

⇒ X/135 = 85/100

⇒ X = 85/100 × 135

∴ X = 114.75 ≅ 115 points

Learn more about proportions at the following link:

brainly.com/question/140018

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