91.15% is the change from 520 to 994
Calculation steps:
[( 994 - 520 ) ÷ 520] x 100 = 91.15%
Formula
Percentage change = [(994 - 520) / 520] x 100
Subtract the new number by the original number
994 - 520 = 474
474 ÷ 520 = 0.9115384615384615
0.9115384615384615 x 100 = 91.15%