The Price of Diesel Fuel Jumped from $2 $\frac { 3 } { 10 }$

The price of diesel fuel jumped from $2.70 to $3.51 in 1 year.
a) What is the increase in the price of diesel fuel?
b) What is the ratio of the increase in price to the original price?

A) a) $6.21; b) $\frac { 3 } { 10 }$
B) a) $0.81; b) $\frac { 3 } { 10 }$
C) a) $0.81; b) $\frac { 10 } { 3 }$
D) a) $6.21; b) $\frac { 10 } { 3 }$
E) a) $0.81; b) $\frac { 3 } { 20 }$