# The value of facebook shares changed from $27.10 on the 8th June 2013 to$30.01 on the 15th June. How do you calculate the percentage change?

$p = \frac{N - O}{O} \cdot 100$ where $p$ is the percent change, $N$ is the new value and $O$ is the old value, In this problem we are told the old value is $27.10 and the new value is 30.01 so we can substitute these for $O$and $N$in the formula and calculate the percentage change: $p = \frac{30.01 - 27.10}{27.10} \cdot 100$$p = \frac{2.91}{27.10} \cdot 100$$p = \frac{291}{27.10}$$p = 10.738$or $10.7\$ rounded to the nears 1/10 percent.