-66.26% is the change from 972 to 328
Calculation steps:
[( 328 - 972 ) ÷ 972] x 100 = -66.26%
Formula
Percentage change = [(328 - 972) / 972] x 100
Subtract the new number by the original number
328 - 972 = -644
-644 ÷ 972 = -0.6625514403292181
-0.6625514403292181 x 100 = -66.26%