-66.31% is the change from 647 to 218
Calculation steps:
[( 218 - 647 ) ÷ 647] x 100 = -66.31%
Formula
Percentage change = [(218 - 647) / 647] x 100
Subtract the new number by the original number
218 - 647 = -429
-429 ÷ 647 = -0.6630602782071098
-0.6630602782071098 x 100 = -66.31%