Question

72%of 25 students are good in mathematics.how many students are not good in mathematic​

Answer 1

Answer:-

7.

Explanation:-

Given:-

Total Students = 25

Percentage of Students good in mathematics = 72 %

To find:-

Number of students not good in mathematics

Let number of Students not good in Mathematics = x   

Percentage of Students not good in mathematics

= 100% − 72%

= 28 %

Percentage of students not good in mathematics = Number of students not good in mathematics/Total students × 100

⇒ 28 = $\frac{x}{25}$ × 100

⇒ 28 = x × 4

⇒ x = $\frac{28}{7}$

⇒ x = 7.

Number of students not good in mathematics = 7.

Answer 2

Answer:

72/100×25

=18 good in maths

not good in math = 25-18 =7

% of students not good in math =7/25×100

=28%