-99.17% is the change from 121 to 1
Calculation steps:
[( 1 - 121 ) ÷ 121] x 100 = -99.17%
Formula
Percentage change = [(1 - 121) / 121] x 100
Subtract the new number by the original number
1 - 121 = -120
-120 ÷ 121 = -0.9917355371900827
-0.9917355371900827 x 100 = -99.17%