-97.33% is the change from 637 to 17
Calculation steps:
[( 17 - 637 ) ÷ 637] x 100 = -97.33%
Formula
Percentage change = [(17 - 637) / 637] x 100
Subtract the new number by the original number
17 - 637 = -620
-620 ÷ 637 = -0.9733124018838305
-0.9733124018838305 x 100 = -97.33%