115.63% is the change from 320 to 690
Calculation steps:
[( 690 - 320 ) ÷ 320] x 100 = 115.63%
Formula
Percentage change = [(690 - 320) / 320] x 100
Subtract the new number by the original number
690 - 320 = 370
370 ÷ 320 = 1.15625
1.15625 x 100 = 115.63%