-98.77% is the change from 977 to 12
Calculation steps:
[( 12 - 977 ) ÷ 977] x 100 = -98.77%
Formula
Percentage change = [(12 - 977) / 977] x 100
Subtract the new number by the original number
12 - 977 = -965
-965 ÷ 977 = -0.9877175025588536
-0.9877175025588536 x 100 = -98.77%