55.25% is the change from 505 to 784
Calculation steps:
[( 784 - 505 ) ÷ 505] x 100 = 55.25%
Formula
Percentage change = [(784 - 505) / 505] x 100
Subtract the new number by the original number
784 - 505 = 279
279 ÷ 505 = 0.5524752475247525
0.5524752475247525 x 100 = 55.25%