64.38% is the change from 320 to 526
Calculation steps:
[( 526 - 320 ) ÷ 320] x 100 = 64.38%
Formula
Percentage change = [(526 - 320) / 320] x 100
Subtract the new number by the original number
526 - 320 = 206
206 ÷ 320 = 0.64375
0.64375 x 100 = 64.38%