Question 1151244
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<pre>

The amount of simple interest is  900*0.03*3 = 81 dollars.


Here 0.03 = 3%;  the number 3 symbolizes 3 years.
</pre>

See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/percentage/lessons/Simple-interest-percentage-problems.lesson>Simple interest percentage problems</A> 

in this site.