65.85% is the change from 123 to 204
Calculation steps:
[( 204 - 123 ) ÷ 123] x 100 = 65.85%
Formula
Percentage change = [(204 - 123) / 123] x 100
Subtract the new number by the original number
204 - 123 = 81
81 ÷ 123 = 0.6585365853658537
0.6585365853658537 x 100 = 65.85%