87% is the change from 523 to 978
Calculation steps:
[( 978 - 523 ) ÷ 523] x 100 = 87%
Formula
Percentage change = [(978 - 523) / 523] x 100
Subtract the new number by the original number
978 - 523 = 455
455 ÷ 523 = 0.869980879541109
0.869980879541109 x 100 = 87%