82.01% is the change from 278 to 506
Calculation steps:
[( 506 - 278 ) ÷ 278] x 100 = 82.01%
Formula
Percentage change = [(506 - 278) / 278] x 100
Subtract the new number by the original number
506 - 278 = 228
228 ÷ 278 = 0.8201438848920863
0.8201438848920863 x 100 = 82.01%