-76.86% is the change from 121 to 28
Calculation steps:
[( 28 - 121 ) ÷ 121] x 100 = -76.86%
Formula
Percentage change = [(28 - 121) / 121] x 100
Subtract the new number by the original number
28 - 121 = -93
-93 ÷ 121 = -0.768595041322314
-0.768595041322314 x 100 = -76.86%