How to format a string with floats in Ruby using #{variable}?
Solution 1:
You can use "#{'%.2f' % var}":
irb(main):048:0> num = 3.1415
=> 3.1415
irb(main):049:0> "Pi is: #{'%.2f' % num}"
=> "Pi is: 3.14"
Solution 2:
Use round:
"Current amount: #{amount.round(2)}"