-71.67% is the change from 766 to 217
Calculation steps:
[( 217 - 766 ) ÷ 766] x 100 = -71.67%
Formula
Percentage change = [(217 - 766) / 766] x 100
Subtract the new number by the original number
217 - 766 = -549
-549 ÷ 766 = -0.716710182767624
-0.716710182767624 x 100 = -71.67%