-71.07% is the change from 764 to 221
Calculation steps:
[( 221 - 764 ) ÷ 764] x 100 = -71.07%
Formula
Percentage change = [(221 - 764) / 764] x 100
Subtract the new number by the original number
221 - 764 = -543
-543 ÷ 764 = -0.7107329842931938
-0.7107329842931938 x 100 = -71.07%