84.17% is the change from 278 to 512
Calculation steps:
[( 512 - 278 ) ÷ 278] x 100 = 84.17%
Formula
Percentage change = [(512 - 278) / 278] x 100
Subtract the new number by the original number
512 - 278 = 234
234 ÷ 278 = 0.841726618705036
0.841726618705036 x 100 = 84.17%