-16.53% is the change from 121 to 101
Calculation steps:
[( 101 - 121 ) ÷ 121] x 100 = -16.53%
Formula
Percentage change = [(101 - 121) / 121] x 100
Subtract the new number by the original number
101 - 121 = -20
-20 ÷ 121 = -0.1652892561983471
-0.1652892561983471 x 100 = -16.53%