33% is the change from 397 to 528
Calculation steps:
[( 528 - 397 ) ÷ 397] x 100 = 33%
Formula
Percentage change = [(528 - 397) / 397] x 100
Subtract the new number by the original number
528 - 397 = 131
131 ÷ 397 = 0.32997481108312343
0.32997481108312343 x 100 = 33%