-63.42% is the change from 637 to 233
Calculation steps:
[( 233 - 637 ) ÷ 637] x 100 = -63.42%
Formula
Percentage change = [(233 - 637) / 637] x 100
Subtract the new number by the original number
233 - 637 = -404
-404 ÷ 637 = -0.6342229199372057
-0.6342229199372057 x 100 = -63.42%