97.04% is the change from 506 to 997
Calculation steps:
[( 997 - 506 ) ÷ 506] x 100 = 97.04%
Formula
Percentage change = [(997 - 506) / 506] x 100
Subtract the new number by the original number
997 - 506 = 491
491 ÷ 506 = 0.9703557312252964
0.9703557312252964 x 100 = 97.04%