Check whether your calculator has a `MOD`, `mod`, or `Remainder` function
Look for it under `Math`, `MATH`, `Shift`, `2nd`, or `Menu`
Enter the first number
Select the `MOD` or remainder operation
Enter the second number
Press `=` to get the result
If there is no `MOD` key, use the remainder formula: `a – b × INT(a ÷ b)`
For some calculators, use `a % b` if the percent key works as modulo
Check the user manual for the exact key sequence for your model