Floating-point division in bash

Question

I\'m trying to convert whatever numbers the user inputs into 2 decimal places. For instance

What is the total cost in cents? 2345
output: 23.45

Answer 1

How about this:

read -p "What is the total cost? " input
percent=20
echo "scale=2; $input / 100 * $percent / 100" | bc

# input = 2345 , output = 4.69