-41.43% is the change from 210 to 123
Calculation steps:
[( 123 - 210 ) ÷ 210] x 100 = -41.43%
Formula
Percentage change = [(123 - 210) / 210] x 100
Subtract the new number by the original number
123 - 210 = -87
-87 ÷ 210 = -0.4142857142857143
-0.4142857142857143 x 100 = -41.43%