90.94% is the change from 320 to 611
Calculation steps:
[( 611 - 320 ) ÷ 320] x 100 = 90.94%
Formula
Percentage change = [(611 - 320) / 320] x 100
Subtract the new number by the original number
611 - 320 = 291
291 ÷ 320 = 0.909375
0.909375 x 100 = 90.94%