71.15% is the change from 305 to 522
Calculation steps:
[( 522 - 305 ) ÷ 305] x 100 = 71.15%
Formula
Percentage change = [(522 - 305) / 305] x 100
Subtract the new number by the original number
522 - 305 = 217
217 ÷ 305 = 0.7114754098360656
0.7114754098360656 x 100 = 71.15%