-78.21% is the change from 312 to 68
Calculation steps:
[( 68 - 312 ) ÷ 312] x 100 = -78.21%
Formula
Percentage change = [(68 - 312) / 312] x 100
Subtract the new number by the original number
68 - 312 = -244
-244 ÷ 312 = -0.782051282051282
-0.782051282051282 x 100 = -78.21%