The following bar graph shows the amount (in lakh Rs.) investment by a company in purchasing raw materials over the years 2015 to 2019.

By how much percent the company increase its investment on raw materials in 2019, as compared to 2015 ?

66.66%

Investment in 2019 = 550

Investment in 2015 = 330

Percentage increase in investment = \(\frac{550 - 330 }{330}\) × 100

= \(\frac{220 }{330}\) × 100

= 66.66%