199.06% is the change from 320 to 957
Calculation steps:
[( 957 - 320 ) ÷ 320] x 100 = 199.06%
Formula
Percentage change = [(957 - 320) / 320] x 100
Subtract the new number by the original number
957 - 320 = 637
637 ÷ 320 = 1.990625
1.990625 x 100 = 199.06%