-17.57% is the change from 797 to 657
Calculation steps:
[( 657 - 797 ) ÷ 797] x 100 = -17.57%
Formula
Percentage change = [(657 - 797) / 797] x 100
Subtract the new number by the original number
657 - 797 = -140
-140 ÷ 797 = -0.17565872020075282
-0.17565872020075282 x 100 = -17.57%