697.62% is the change from 84 to 670
Calculation steps:
[( 670 - 84 ) ÷ 84] x 100 = 697.62%
Formula
Percentage change = [(670 - 84) / 84] x 100
Subtract the new number by the original number
670 - 84 = 586
586 ÷ 84 = 6.976190476190476
6.976190476190476 x 100 = 697.62%