81.78% is the change from 538 to 978
Calculation steps:
[( 978 - 538 ) ÷ 538] x 100 = 81.78%
Formula
Percentage change = [(978 - 538) / 538] x 100
Subtract the new number by the original number
978 - 538 = 440
440 ÷ 538 = 0.8178438661710037
0.8178438661710037 x 100 = 81.78%