The following table gives the number of patients visiting a dental clinic for the issues related to their oral health during the months May, June, July and August in 2015. Study the table carefully and answer the question that follows.

For the given months in 2015, the average number of patients visiting the dental clinic for Cleaning and polishing of teeth, Fixing crowns and bridging and Teeth whitening is what percentage(rounded off to 1 decimal place) more/less than the average number of patients visiting the dental clinic for Orthodontic treatment?

Less by 31.2 Percent

Average of patient for Cleaning and polishing of teeth, Fixing crowns and bridging and Teeth whitening

= \(\frac{410 + 160 + 520+440+880+970+680+590+360+270+530+280}{12}\)

= \(\frac{6090}{12}\)

= 507.5

Average of  Patient for Orthodontic treatment

= \(\frac{680 + 790 + 460 + 1020}{4}\)

= \(\frac{ 2950}{4}\)

= 737.5

Required percentage = \(\frac{737.5 - 507.5}{737.5}\) × 100

= \(\frac{230}{737.5}\) × 100

= 31.18%

= 31.2%

Ans :- Less by 31.2 Percent