If the CPI Is 231 $\frac { ( 241.2 - 231.4 ) } { 231.4 }$

If the CPI is 231.4 in one year and is 241.2 in the next year, then the inflation rate equals

A) (241.2-231.4) × 100.
B) $\frac { ( 241.2 - 231.4 ) } { 231.4 }$ × 100.
C) $\frac { ( 241.2 - 231.4 ) } { 241.2 }$ × 100.
D) $\frac { ( 231.4 - 241.2 ) } { 231.4 }$ × 100.
E) $\frac { ( 231.4 - 241.2 ) } { 241.2 }$ × 100.