142.31% is the change from 390 to 945
Calculation steps:
[( 945 - 390 ) ÷ 390] x 100 = 142.31%
Formula
Percentage change = [(945 - 390) / 390] x 100
Subtract the new number by the original number
945 - 390 = 555
555 ÷ 390 = 1.4230769230769231
1.4230769230769231 x 100 = 142.31%