-66.41% is the change from 637 to 214
Calculation steps:
[( 214 - 637 ) ÷ 637] x 100 = -66.41%
Formula
Percentage change = [(214 - 637) / 637] x 100
Subtract the new number by the original number
214 - 637 = -423
-423 ÷ 637 = -0.6640502354788069
-0.6640502354788069 x 100 = -66.41%