I need help pls
i will give 25 points

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

I’m still confused on how to work the percentages

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?