5. In 1972, the price of an article was 4. In 2015, the price of that article became 68. By what per cent has
the price gone up?
Answers
Answered by
1
Step-by-step explanation:
Consider the problem
Let the original price =Rsx
Price after p% increase =(100+p)% of x
=
100
(100+p)x
New price after p% decrease
=(100−p)%of[
100
(100+p)x
]
=
100
(100−p)
×
100
(100+p)
×x
=
100×100
(100−p)(100+p)
×x=1
Or
x=
(100−p)(100+p)
100×100
=
10000−p
2
10000
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