21.38% is the change from 669 to 812
Calculation steps:
[( 812 - 669 ) ÷ 669] x 100 = 21.38%
Formula
Percentage change = [(812 - 669) / 669] x 100
Subtract the new number by the original number
812 - 669 = 143
143 ÷ 669 = 0.21375186846038863
0.21375186846038863 x 100 = 21.38%