# Marlis has 900 cards in her baseball collection. She sells 171 of her cards. What is the percent of decrease in the number of cards in her collection?

Oct 27, 2016

19% decrease in her collection

#### Explanation:

$171$ of $900$ represents $\frac{171}{900}$ of her collection.

As a percentage
color(white)("XXX")171/(9cancel(00))xx1cancel(00)%

color(white)("XXX")=(cancel(171)^19)/cancel(9)%

color(white)("XXX")=19%