Answer:
<u>algorithm</u>
original = float(raw_input("Enter initial balance: "))
interest = float(raw_input("Enter promised return: "))
expenses = float(raw_input("Enter monthly expenses: "))
interest = interest / 100 / 12
month = 0
balance = original
if balance * interest - expenses >= 0:
print "You don't need to worry."
else:
while balance + balance * interest - expenses >= 0: # negation of the if condition
balance = balance + interest * balance # in one month
balance = balance - expenses
month = month + 1
print month, balance
print month / 12, "years and", month % 12, "months"
