-17.05% is the change from 645 to 535
Calculation steps:
[( 535 - 645 ) ÷ 645] x 100 = -17.05%
Formula
Percentage change = [(535 - 645) / 645] x 100
Subtract the new number by the original number
535 - 645 = -110
-110 ÷ 645 = -0.17054263565891473
-0.17054263565891473 x 100 = -17.05%