Question

The total amount equals the sum of the principal and the interest.​

Answer 1

Compound interest is the addition of interest to the principal sum of a loan or deposit, or in other words, interest on interest. It is the result of reinvesting interest, rather than paying it out, so that interest in the next period is then earned on the principal sum plus previously accumulated interest.

Answer 2

Interest is just the additional amount to be paid on the sum of money loaned or borrowed. The main amount to be paid is the principal amount. Interest is added to compensate the duration that the money was not used by the lender. The total amount to be paid by the borrower to the lender is called future amount.

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