58.49% is the change from 530 to 840
Calculation steps:
[( 840 - 530 ) ÷ 530] x 100 = 58.49%
Formula
Percentage change = [(840 - 530) / 530] x 100
Subtract the new number by the original number
840 - 530 = 310
310 ÷ 530 = 0.5849056603773585
0.5849056603773585 x 100 = 58.49%