20.78% is the change from 664 to 802
Calculation steps:
[( 802 - 664 ) ÷ 664] x 100 = 20.78%
Formula
Percentage change = [(802 - 664) / 664] x 100
Subtract the new number by the original number
802 - 664 = 138
138 ÷ 664 = 0.20783132530120482
0.20783132530120482 x 100 = 20.78%