An baseball player’s batting average decreases from 0.312 to 0.278. what is the percent decreased?

Step-by-step explanation:

An baseball player’s batting average decreases from 0.312 to 0.278 .

Let be the initial  baseball player’s batting average and be the final baseball player’s batting average .

Initial value = 0.312

Final value = 0.278

So, change in value =Final value - Initial value =   =

Therefore , decrease in value = 0.034

We know that  percent decreased = ( decrease in value × 100 ) ÷ Initial value

i.e. ,

Or we can say percentage change in  baseball player’s batting average =

12-23=-11

I say this because when subtracting different signs keep the one of the greater absolute value. and 23-12=11 last add a decimal to the beginnings.

-11