-36.31% is the change from 997 to 635
Calculation steps:
[( 635 - 997 ) ÷ 997] x 100 = -36.31%
Formula
Percentage change = [(635 - 997) / 997] x 100
Subtract the new number by the original number
635 - 997 = -362
-362 ÷ 997 = -0.3630892678034102
-0.3630892678034102 x 100 = -36.31%