81.5% is the change from 535 to 971
Calculation steps:
[( 971 - 535 ) ÷ 535] x 100 = 81.5%
Formula
Percentage change = [(971 - 535) / 535] x 100
Subtract the new number by the original number
971 - 535 = 436
436 ÷ 535 = 0.8149532710280374
0.8149532710280374 x 100 = 81.5%