-7.45% is the change from 685 to 634
Calculation steps:
[( 634 - 685 ) ÷ 685] x 100 = -7.45%
Formula
Percentage change = [(634 - 685) / 685] x 100
Subtract the new number by the original number
634 - 685 = -51
-51 ÷ 685 = -0.07445255474452554
-0.07445255474452554 x 100 = -7.45%