21.38% is the change from 800 to 971
Calculation steps:
[( 971 - 800 ) ÷ 800] x 100 = 21.38%
Formula
Percentage change = [(971 - 800) / 800] x 100
Subtract the new number by the original number
971 - 800 = 171
171 ÷ 800 = 0.21375
0.21375 x 100 = 21.38%