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Challenge 71: Tip Calculator

curriculum/challenges/english/blocks/daily-coding-challenges-python/68cae5b538ff798bbd4da009.md

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--description--

Given the price of your meal and a custom tip percent, return an array with three tip values; 15%, 20%, and the custom amount.

  • Prices will be given in the format: "$N.NN".
  • Custom tip percents will be given in this format: "25%".
  • Return amounts in the same "$N.NN" format, rounded to two decimal places.

For example, given a "$10.00" meal price, and a "25%" custom tip value, return ["$1.50", "$2.00", "$2.50"].

--hints--

calculate_tips("$10.00", "25%") should return ["$1.50", "$2.00", "$2.50"].

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(calculate_tips("$10.00", "25%"), ["$1.50", "$2.00", "$2.50"])`)
}})

calculate_tips("$89.67", "26%") should return ["$13.45", "$17.93", "$23.31"].

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(calculate_tips("$89.67", "26%"), ["$13.45", "$17.93", "$23.31"])`)
}})

calculate_tips("$19.85", "9%") should return ["$2.98", "$3.97", "$1.79"].

js
({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(calculate_tips("$19.85", "9%"), ["$2.98", "$3.97", "$1.79"])`)
}})

--seed--

--seed-contents--

py
def calculate_tips(meal_price, custom_tip):

    return meal_price

--solutions--

py
def calculate_tips(meal_price, custom_tip):
    meal = float(meal_price[1:])
    custom_percent = float(custom_tip[:-1])

    tips_percent = [15, 20, custom_percent]
    tips = [f"${meal * p / 100:.2f}" for p in tips_percent]

    return tips