Question

Finding the Increase or Decrease Per cent.
We often come across such information in our daily life as.
(1) 25% off on marked prices
(i) 10% hike in the price of petrol.​

Answer 1

Answer:

Finding the Increase or Decrease Per cent.

We often come across such information in our daily life as.

(1) 25% off on marked prices

(i) 10% hike in the price of petrol.

Answer 2

Answer:

Then, the ratio of the number of oranges to the number of apples = 5 : 20.

The comparison can be done by using fractions as,

5

20

=

1

4

The number of oranges are

1

4

th the number of apples. In terms of ratio, this is 1 : 4, read as, “1 is to 4”

OR

Number of apples to number of oranges =

20

5

=

4

1

which means, the number of apples are 4 times the number of oranges. This comparison can also be done using percentages.

There are 5 oranges out of 25 fruits.

So percentage of orange is

5

25

×

4

4

=

20

100

=20%

[Denominator made 100]

OR

By unitary method

Out of 25 fruits number of oranges are 5. So out of 100 fruits, number of oranges

5

25

×100=20

Since