Book Maths Puzzle

A man’s wages were reduced by 45%. Again, the reduced wages were increased by 45%. Find the percentage decrease in his original wages

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Book Other Question

The interior angles of a polygon are in A.P. The smallest angle is 114degree
and the common difference is 6 degree. How many sides are there in the polygon?
Two numbers are respectively 40% and 50% more than the third number. What percentage of the 2nd
number is the first number?