-68.92% is the change from 637 to 198
Calculation steps:
[( 198 - 637 ) ÷ 637] x 100 = -68.92%
Formula
Percentage change = [(198 - 637) / 637] x 100
Subtract the new number by the original number
198 - 637 = -439
-439 ÷ 637 = -0.6891679748822606
-0.6891679748822606 x 100 = -68.92%