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# [Smart Math] Percentages Problem 1

Here’s and example of a SMART MATH problem for PERCENTAGES.

### Problem

How much will $12,000 amount to in 2 years at compound interest if the rates for the 2 years are 5% and 7% per annum? 1.$12,662
2. $15,248 3.$14,336
4. $13,884 5.$13,482

### The Usual Method

Original Principle = $12,000 Principle after 1st year = 12,000 x 1.05 =$12,600
Principle after 2nd year = 12,600 x 1.07 = \$13,482

(Ans: 5)

Estimated Time to arrive at the answer = 60 seconds

### Using Technique

i.e. $\frac{12000\times 12}{100}$ = 1440