-77.7% is the change from 305 to 68
Calculation steps:
[( 68 - 305 ) ÷ 305] x 100 = -77.7%
Formula
Percentage change = [(68 - 305) / 305] x 100
Subtract the new number by the original number
68 - 305 = -237
-237 ÷ 305 = -0.7770491803278688
-0.7770491803278688 x 100 = -77.7%