-67.96% is the change from 284 to 91
Calculation steps:
[( 91 - 284 ) ÷ 284] x 100 = -67.96%
Formula
Percentage change = [(91 - 284) / 284] x 100
Subtract the new number by the original number
91 - 284 = -193
-193 ÷ 284 = -0.6795774647887324
-0.6795774647887324 x 100 = -67.96%