20.79% is the change from 534 to 645
Calculation steps:
[( 645 - 534 ) ÷ 534] x 100 = 20.79%
Formula
Percentage change = [(645 - 534) / 534] x 100
Subtract the new number by the original number
645 - 534 = 111
111 ÷ 534 = 0.20786516853932585
0.20786516853932585 x 100 = 20.79%