Question

due to pulse polio campaign,the number of polio cases in uttarakhand has come down by 85% to 135. find the number of cases earlier.​

Answer 1

Answer:

There were 900 cases of polio before the campaign.

Step-by-step explanation:

Let the Earlier No. of polio cases be x.

So, (100-85)% of x=135

=> 15% of x=135

=> 15x/100=135

=> x/100=135/15

=> x/100=9

=> x=900 cases

Answer 2

Answer:

The answer will be 900.

Step-by-step explanation:

The step-by-step explanation is given in the picture.