77.21% is the change from 294 to 521
Calculation steps:
[( 521 - 294 ) ÷ 294] x 100 = 77.21%
Formula
Percentage change = [(521 - 294) / 294] x 100
Subtract the new number by the original number
521 - 294 = 227
227 ÷ 294 = 0.7721088435374149
0.7721088435374149 x 100 = 77.21%