Answer :
The percentage increase in the cost of oranges is 20%
What is meant by percentage?
A % is a quantity or ratio stated as a fraction of 100 in mathematics (from the Latin per centum, "by a hundred"). The abbreviation "pct.", "pct.", and occasionally "pc" are also used to indicate it, but the percent sign, "%," is more frequently employed. There is no unit of measurement for a %; it is a dimensionless number (pure number).
The symbol for "%" developed from the progressive reduction of the Italian term per cento, which means "for a hundred." It finally vanished totally. The word "per" was frequently shortened to "p." Two circles and a horizontal line made up the "cento," which is how the contemporary "%" symbol is now represented.
Given that the oranges at the grocery store went from $0.75/ib to $ 0.90/ib
=(0.90-0.75)/0.75
=0.15/0.75
=0.2
% increase= 0.2*100
=20%
Therefore, the percentage increase in the cost of oranges is 20%
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