-17.21% is the change from 802 to 664
Calculation steps:
[( 664 - 802 ) ÷ 802] x 100 = -17.21%
Formula
Percentage change = [(664 - 802) / 802] x 100
Subtract the new number by the original number
664 - 802 = -138
-138 ÷ 802 = -0.17206982543640897
-0.17206982543640897 x 100 = -17.21%