246.77% is the change from 186 to 645
Calculation steps:
[( 645 - 186 ) ÷ 186] x 100 = 246.77%
Formula
Percentage change = [(645 - 186) / 186] x 100
Subtract the new number by the original number
645 - 186 = 459
459 ÷ 186 = 2.467741935483871
2.467741935483871 x 100 = 246.77%