-97.8% is the change from 637 to 14
Calculation steps:
[( 14 - 637 ) ÷ 637] x 100 = -97.8%
Formula
Percentage change = [(14 - 637) / 637] x 100
Subtract the new number by the original number
14 - 637 = -623
-623 ÷ 637 = -0.978021978021978
-0.978021978021978 x 100 = -97.8%