Inflation causes things to cost more, and for our money to buy less (hence your grandparents saying "In my day, you could buy a
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The easiest way is if it doesn't need to be simplified. Multiply -2.105 by 
. You get the fraction 
. While this is technically the answer, you can simplify this down to 
. Because 421 is a prime number, this can not be simplified any further. Therefore, the solution is .
.