Question

The Marks in a test decreased from 40 to 30. The percent decrease is​

Answer 1

Answer:

25 percent

25 percentStep-by-step explanation:

25 percentStep-by-step explanation:beacause 40's 25 part is 10 so we minus

40-10=30

Answer 2

The percent of decrease in marks = 25%

Given :

The Marks in a test decreased from 40 to 30.

To find :

The percent decrease in marks

Solution :

Step 1 of 2 :

Calculate decrease in marks

Here it is given that Marks in a test decreased from 40 to 30.

Decrease in marks

= 40 - 30

= 10

Step 2 of 2 :

Calculate percent of decrease in marks

The percent of decrease in marks

$\displaystyle \sf{ = \frac{10}{40} \times 100\% }$

$\displaystyle \sf{ = \frac{1}{4} \times 100\% }$

$\displaystyle \sf{ = 25\% }$

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