-39.12% is the change from 997 to 607
Calculation steps:
[( 607 - 997 ) ÷ 997] x 100 = -39.12%
Formula
Percentage change = [(607 - 997) / 997] x 100
Subtract the new number by the original number
607 - 997 = -390
-390 ÷ 997 = -0.39117352056168503
-0.39117352056168503 x 100 = -39.12%