Increase or Decrease as Percent
Suppose two group of children are playing in a park.
And, each group has
$10$
children and we named the group as
$A$
and
$B$
.
After some time two more children come and join the group
$A$
.
Now, the number of children in group
$A$
are increased by
$2$
.
And, after some time
$3$
children left from group
$B$
.
So, the number of children in group
$B$
decreased by
$3$
.
In the above situation, we observe that the number of children in one group increases while in other group decreases.
The increase and decrease can be defined in terms of percentage.
Percentage is defined as representing values in fraction where denominator is always
$100$
. For ex
Letâ€™s try to find the increase or decrease in percent
Here, in first group the number of children is increased by
$2$
.
So, the change in number of children is
$2$
.
Then, using this formula percentage increase is calculated.
So, the
$%$
increase in number of children is
$20$
.
Therefore, we can say there are
$20%$
more children in group A than earlier.
Now, letâ€™s consider group
$B$
, where
$3$
children left the group.
Here, the change in number of children is,
And, we can find
$%$
decrease as,
So, the
$%$
decrease in number of children is
So, there are
$30%$
less children in group
$B$
than before.
Revision
Percentage is defined as representing values in fraction whose denominator is always
$100$
. For ex
We can find percentage increase as,
And, percentage decrease can be calculated as,
The End