Help with simple tip calculator

[snippsat]

You should use a version so this work.
Which mean 3.6 or preferably 3.7.

price_meal = float(input("How much did your meal cost? "))
tip = float(input("How much do you want to tip, in decimal form? "))
price_meal += price_meal + tip
print(f'Your total cost is {price_meal:.2f}.')

f-string is the newest way.
Install for Windows Python 3.6/3.7 and pip installation under Windows,
for Linux so comes newer distros like Ubuntu 18.10 and Mint 19 with Python 3.6.5 as default install.