History

  1. Press = or Enter to keep a result here

Percentage change

Increase by %

Decrease by %

Percent of

What percent

Before the change

Fraction, decimal, percent

How to use Calculate

  1. Type a sum, or use the keypad.
  2. Use the side panels for percentage change, increase and decrease.
  3. Press = or Enter to keep a result in your history.
Why fractions?
Results stay exact, so 1/3 + 1/3 gives 2/3 instead of 0.666…
Does it do percentages?
Yes: percent of, percentage change, increase and decrease each have their own panel.