-80.45% is the change from 312 to 61
Calculation steps:
[( 61 - 312 ) ÷ 312] x 100 = -80.45%
Formula
Percentage change = [(61 - 312) / 312] x 100
Subtract the new number by the original number
61 - 312 = -251
-251 ÷ 312 = -0.8044871794871795
-0.8044871794871795 x 100 = -80.45%