-77.67% is the change from 972 to 217
Calculation steps:
[( 217 - 972 ) ÷ 972] x 100 = -77.67%
Formula
Percentage change = [(217 - 972) / 972] x 100
Subtract the new number by the original number
217 - 972 = -755
-755 ÷ 972 = -0.7767489711934157
-0.7767489711934157 x 100 = -77.67%