-77.88% is the change from 972 to 215
Calculation steps:
[( 215 - 972 ) ÷ 972] x 100 = -77.88%
Formula
Percentage change = [(215 - 972) / 972] x 100
Subtract the new number by the original number
215 - 972 = -757
-757 ÷ 972 = -0.7788065843621399
-0.7788065843621399 x 100 = -77.88%