A typist uses a paper of size 32 cm $$\times$$ 20 cm. He leaves a margin of 2 cm each on all the sides. If he leaves a margin of 1 cm only on all the sides, then what is the percentage of the increase in the area available for typing (correct to 2 decimal places)?

A

20.54%

B

82.96%

C

17.04%

D

79.46%