The meaning of per cent is “per hundred” or “hundredth value”. Per cent is a fraction where denominator is 100 . Percent is denoted by sign ” % “.
Important points related to percentage are
1. To convert a fraction or decimal fraction into percentage multiply the fraction by 100.
2. To convert a percentage into a fraction or decimal fraction, remove sign “%” and divide the value by 100.
Ex: The percentage change in a number when it is first decreased by 10% and then increased by 10%, is
(a) 0.1% increase
(b) 1% decrease
(c) 0.1% decrease
(d) No changes
Ex: The price of an article is first increased by 20% and later on the price was decreased by 25% due to reduction in sales. Find the net percentage change in final price of article.
(a) 10% decrease
(b) 5% increase
(c) 20% increase
(d) 12% decrease
Ex: Gaurav spends 30% o of his monthly income on food articles, 40% of the remaining on conveyance and Clothes and saves 50% of the remaining. If his monthly salary 18400, how much money does he save every month?
Ex: The population of a town increases by 5% every year. If the present population is 9261 , the population 3 yr ago was