-77.63% is the change from 970 to 217
Calculation steps:
[( 217 - 970 ) ÷ 970] x 100 = -77.63%
Formula
Percentage change = [(217 - 970) / 970] x 100
Subtract the new number by the original number
217 - 970 = -753
-753 ÷ 970 = -0.7762886597938145
-0.7762886597938145 x 100 = -77.63%