Converts a string representing a number in a specified base, to an int. The minimum allowed base is 2, the maximum depends on the number of the allowed digit values found in the string CIFRE, ...

Implementations are for learning purposes only. They may be less efficient than the implementations in the Python standard library. Use them at your discretion.

Fractions can be converted into percentages. In fact, percentages are fractions that are over 100. When writing percentages the per cent symbol (%) is used. Things can be described as percentages even ...

Multiplication is working out how many groups of something you have altogether. Division is working how many you get, after sharing a number between another number. You can use place value charts to ...