-89.81% is the change from 667 to 68
Calculation steps:
[( 68 - 667 ) ÷ 667] x 100 = -89.81%
Formula
Percentage change = [(68 - 667) / 667] x 100
Subtract the new number by the original number
68 - 667 = -599
-599 ÷ 667 = -0.8980509745127436
-0.8980509745127436 x 100 = -89.81%