-66.19% is the change from 970 to 328
Calculation steps:
[( 328 - 970 ) ÷ 970] x 100 = -66.19%
Formula
Percentage change = [(328 - 970) / 970] x 100
Subtract the new number by the original number
328 - 970 = -642
-642 ÷ 970 = -0.6618556701030928
-0.6618556701030928 x 100 = -66.19%