What is a given percent of a number?
To find X% of Y, convert the percent to a decimal and multiply.
Compare the change to the original value, not the new one.
A positive result is an increase; a negative result is a decrease.
Divide the part by the whole, then convert to a percentage.
Planning a budget? Try the tip calculator or the compound interest calculator.
Is a percentage increase and a percentage point the same thing? No — going from 20% to 30% is a 10 percentage-point increase, but a 50% relative increase.
Can percentages be negative? Yes, a decrease is shown as a negative percent change.