50.64% is the change from 545 to 821
Calculation steps:
[( 821 - 545 ) ÷ 545] x 100 = 50.64%
Formula
Percentage change = [(821 - 545) / 545] x 100
Subtract the new number by the original number
821 - 545 = 276
276 ÷ 545 = 0.5064220183486239
0.5064220183486239 x 100 = 50.64%