1 Find percentage of increase or decrease :
Price of shirt decreased from " 280 to " 210.
Marks in a test increased from 20 to 30.
2.My mother says in her childhood petrol was " 1 a litre . it is " 52 per litre today . By what percentage has the price gone up ?
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Answered by
13
Answer:
a) percentage decrease= number by which decreased/original number x 100
= 70/280 x 100
= 25%
b) percentage increase= number by which increase/ original number x 100
= 10/20 x 100
= 50%
c) percentage increase= number by which increase/ original number x 100
= 51/52 x 100
= 98.07692307692308%
Answered by
14
Step-by-step explanation:
it is a CBSE book class 7 written in it
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