-89.53% is the change from 678 to 71
Calculation steps:
[( 71 - 678 ) ÷ 678] x 100 = -89.53%
Formula
Percentage change = [(71 - 678) / 678] x 100
Subtract the new number by the original number
71 - 678 = -607
-607 ÷ 678 = -0.8952802359882006
-0.8952802359882006 x 100 = -89.53%