-59.8% is the change from 306 to 123
Calculation steps:
[( 123 - 306 ) ÷ 306] x 100 = -59.8%
Formula
Percentage change = [(123 - 306) / 306] x 100
Subtract the new number by the original number
123 - 306 = -183
-183 ÷ 306 = -0.5980392156862745
-0.5980392156862745 x 100 = -59.8%