A Guide to the GRE/Percentages
Percentages[edit | edit source]
Percentage is a fraction of 100. 11% = .11 =
Percent simply means “per hundred.” However, be careful not to mix up the two key ways in which percentages are used.
Do not mix up changing to a percentage with changing by a percentage.
If a group of 100 members decreases to 20% of its membership, its membership goes down to 20. If the group decreases by 20%, it goes down to 80. Increasing to 110% is the same as increasing by 10%. This also applies to fractions and decimals but is an especially common error with percentages.
Practice[edit | edit source]