15.32% is the change from 581 to 670
Calculation steps:
[( 670 - 581 ) ÷ 581] x 100 = 15.32%
Formula
Percentage change = [(670 - 581) / 581] x 100
Subtract the new number by the original number
670 - 581 = 89
89 ÷ 581 = 0.153184165232358
0.153184165232358 x 100 = 15.32%