83.77% is the change from 419 to 770
Calculation steps:
[( 770 - 419 ) ÷ 419] x 100 = 83.77%
Formula
Percentage change = [(770 - 419) / 419] x 100
Subtract the new number by the original number
770 - 419 = 351
351 ÷ 419 = 0.837708830548926
0.837708830548926 x 100 = 83.77%