To multiply percentages on a calculator, you'll need to convert them to decimal form first. This means switching the percentage sign (%) to a decimal point (.) - easy peasy! For instance, 25% becomes 0.25.
Now, let's get to the good stuff - the multiplication part. Simply multiply the decimal values together, just like you would with regular numbers. So, if you want to multiply 25% by 50%, you'd calculate 0.25 x 0.50.
The result is a pretty cool 0.125, which you can then convert back to a percentage by multiplying by 100 (or just moving the decimal point two places to the right). Voilà! You've successfully multiplied percentages on a calculator.