Question

15% of an amount is 30. Calculate the whole amount using two different strategies, one of which must include a pictorial model.

Answer 1

whole amount is 200 for 15 % is 30

Explanation:

given data

15% amount = 30

to find out

Calculate the whole amount

solution

a pictorial model is attach find that

where we can see easily whole amount is 200 for 15 % is 30

and

15% is 30

here 15% =
`(15)/(100)`

and
`(15)/(100)` =
`(30)/(200)`

so whole amount is 200 for 15 % is 30

Answer 2

Whole amount is 200.

Explanation:

Given that

15 % of an amount is 30.

Lets that amount is x.

So the 15 % of x will be 0.15x (We know that percentage = 1/100)

So 0.15 x = 30

x= 30/0.15

So x= 200

So the whole amount is 200.

From the diagram we can easily see that at 0% the amount is 0 ,at 5% the amount is 10 and at 100% the amount is 200.