91.7% is the change from 506 to 970
Calculation steps:
[( 970 - 506 ) ÷ 506] x 100 = 91.7%
Formula
Percentage change = [(970 - 506) / 506] x 100
Subtract the new number by the original number
970 - 506 = 464
464 ÷ 506 = 0.9169960474308301
0.9169960474308301 x 100 = 91.7%