-68.4% is the change from 288 to 91
Calculation steps:
[( 91 - 288 ) ÷ 288] x 100 = -68.4%
Formula
Percentage change = [(91 - 288) / 288] x 100
Subtract the new number by the original number
91 - 288 = -197
-197 ÷ 288 = -0.6840277777777778
-0.6840277777777778 x 100 = -68.4%