393.38% is the change from 136 to 671
Calculation steps:
[( 671 - 136 ) ÷ 136] x 100 = 393.38%
Formula
Percentage change = [(671 - 136) / 136] x 100
Subtract the new number by the original number
671 - 136 = 535
535 ÷ 136 = 3.9338235294117645
3.9338235294117645 x 100 = 393.38%