-77.78% is the change from 306 to 68
Calculation steps:
[( 68 - 306 ) ÷ 306] x 100 = -77.78%
Formula
Percentage change = [(68 - 306) / 306] x 100
Subtract the new number by the original number
68 - 306 = -238
-238 ÷ 306 = -0.7777777777777778
-0.7777777777777778 x 100 = -77.78%