-84.3% is the change from 121 to 19
Calculation steps:
[( 19 - 121 ) ÷ 121] x 100 = -84.3%
Formula
Percentage change = [(19 - 121) / 121] x 100
Subtract the new number by the original number
19 - 121 = -102
-102 ÷ 121 = -0.8429752066115702
-0.8429752066115702 x 100 = -84.3%