3 Ways to Work With Percentages of Increase and Decrease - wikiHow
Percentage Increase and Decrease | Percentage Change | Math Dot Com - YouTube
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Corbettmaths on Twitter: "Percentage Change: you may be asked to calculate percentage increase/decrease etc http://t.co/A0xEOnea1b http://t.co/PqB5VUO37K" / Twitter
Calculating Percent Increase in 3 Easy Steps — Mashup Math