If an amount of $100 in a savings account increases by 10%, then increases by 10% again, is that the same as increasing by 20%? And explain.

Question

Mathematics

Kirk

31 December, 14:44

If an amount of $100 in a savings account increases by 10%, then increases by 10% again, is that the same as increasing by 20%? And explain.

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Jensen Baxter · Answer 1

10% of 100$ is 10$, so the new amount in the account is 100+10=110$. 10% of 110$ is 11$, so the new amount in the account is 110+11=121$.

20% of 100$ is 20$, wo the new amount in the account is 100+20=120$.

It's not the same, because when you do it twice by 10%, the value changes in between.