*Grade level: 4th – 5th grades*

*Skills: Subtract Decimals*

*Related environmental issues: Recycle*

*Area level: National*

The table below shows recycling rate of plastic bottles in the United States between 2008 and 2013. Recycling rate represents what percentage of discarded plastic bottles were recycled.

1.What percentage did recycling rate of plastic bottles change between 2008 and 2009?

2.Between which years did recycling rate of plastic bottles change the least?

3.Between which years did recycling rate of plastic bottles change the most?

4.Had recycling rate of plastic bottles increased or decreased since 2008?

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Answer keys

- 0.8% (28.0-27.2 = 0.8)
- between 2010 and 2011
- between 2011 and 2012
- increased