256.38% is the change from 188 to 670
Calculation steps:
[( 670 - 188 ) ÷ 188] x 100 = 256.38%
Formula
Percentage change = [(670 - 188) / 188] x 100
Subtract the new number by the original number
670 - 188 = 482
482 ÷ 188 = 2.5638297872340425
2.5638297872340425 x 100 = 256.38%