Question

find the percentage of increase and decrease in the following cases a.) population of a town increased from 5 lakhs to 6 lakhs in three years.

b.) price of a shirt reduced from 480 rupees to 460 rupees.
There is a small clue for you (a)answer should be 20% and (b)answer should be 4 whole 1/6%
But I need complete process
if u don't know the answer then give the chance for others to check up their knowledge
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Answer 1

here I attached file go through it dr