A percentage calculator

In your work as a data scientist, you often find yourself needing to calculate percentages within Bash scripts. This would be a great opportunity to create a nice modular function to be called from different places in your code.

Your task is to create a Bash function that will calculate a percentage of two numbers that are given as arguments and return the value.

A test example you can think of to use in this script is a model that you just ran where there were 456 correct predictions out of 632 on the test set.

Remember that the shell can't natively handle decimal places, so it will be safer to employ the use of bc.