Respuesta :
The formula is change over the original.
$40-$28= 12
12/40
You divide 12 by 40 which gives you an answer of 0.3.
You then convert this into a percentage.
You move the decimal 2 places to the right which equals 30%
The percentage change is 30%
Answer: -30%
Step-by-step explanation: When you do the math you Will end up with 30% but it is % of change so the logical answer would be -30%