The following table gives the sales of an electronic chip over 5 years. Find percentage increase in sales in year 2012 to the year 2011?

5.55% 4.44% 6.67% 7.88%

5.55%

Increase in sale in 2012 is = 57 - 54 = 3 Percentage increase = \(\frac{3}{54}\) × 100% = 5.55%