-36.21% is the change from 997 to 636
Calculation steps:
[( 636 - 997 ) ÷ 997] x 100 = -36.21%
Formula
Percentage change = [(636 - 997) / 997] x 100
Subtract the new number by the original number
636 - 997 = -361
-361 ÷ 997 = -0.362086258776329
-0.362086258776329 x 100 = -36.21%