Answer
10%
-2%
6%
Work Step by Step
$percent\ change = \frac{new\ value-old\ value}{old\ value}\times100$
$\frac{11-10}{10}\times100=\frac{1}{10}\times100=10$
$\frac{98-100}{100}\times100=\frac{-2}{100}\times100=-2$
$\frac{53-50}{50}\times100=\frac{3}{50}\times100=6$
