16.57% is the change from 839 to 978
Calculation steps:
[( 978 - 839 ) ÷ 839] x 100 = 16.57%
Formula
Percentage change = [(978 - 839) / 839] x 100
Subtract the new number by the original number
978 - 839 = 139
139 ÷ 839 = 0.16567342073897498
0.16567342073897498 x 100 = 16.57%