Question

In Mary's english class, the ratio of the number of students receiving A grade to the total number of student is 6:25 and in John's English class, the above ratio is 5:20. which class has a better record of A grades ?

Answer 1

Answer:

John's English class  has a better record of A grades

Step-by-step explanation:

Given : The ratio of the number of students receiving A grade to the total number of student is 6:25 and in John's English class, the above ratio is 5:20.

To Find : which class has a better record of A grades ?

Solution:

The ratio of the number of students receiving A grade to the total number of student is 6:25 = $\frac{6}{25}$

In John's English class, the above ratio is 5:20 = $\frac{5}{20}$

Take LCM of 25 and 20

So, LCM of 20 and 25 is  100

$\frac{6 \times 4}{25 \times 4} = \frac{24}{100}$

$\frac{5 \times 5}{20 \times 5} = \frac{25}{100}$

So, $\frac{24}{100}<\frac{25}{100}$

So, John's English class  has a better record of A grades

Answer 2

Step-by-step explanation:

LCM of 25 and 20

100

mary -6*4-24/25*4-100.

24/100

jhon - 5*5-25/20*5-100

25/100