Simple interest

Peter put into bank 853 euros deposit. After 7 years on account overall was 984 euro.

What was the interest rate if bank add simple interest?

Correct answer:

p =  2.2 %

Step-by-step explanation:

u=984853=131 Eur u1=u/7=131/7=713118.7143 Eur  p=100 853u1=100 8537131=2.2%

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