129.71% is the change from 377 to 866
Calculation steps:
[( 866 - 377 ) ÷ 377] x 100 = 129.71%
Formula
Percentage change = [(866 - 377) / 377] x 100
Subtract the new number by the original number
866 - 377 = 489
489 ÷ 377 = 1.297082228116711
1.297082228116711 x 100 = 129.71%