-34.04% is the change from 996 to 657
Calculation steps:
[( 657 - 996 ) ÷ 996] x 100 = -34.04%
Formula
Percentage change = [(657 - 996) / 996] x 100
Subtract the new number by the original number
657 - 996 = -339
-339 ÷ 996 = -0.34036144578313254
-0.34036144578313254 x 100 = -34.04%