-79.13% is the change from 647 to 135
Calculation steps:
[( 135 - 647 ) ÷ 647] x 100 = -79.13%
Formula
Percentage change = [(135 - 647) / 647] x 100
Subtract the new number by the original number
135 - 647 = -512
-512 ÷ 647 = -0.7913446676970634
-0.7913446676970634 x 100 = -79.13%