75.42% is the change from 297 to 521
Calculation steps:
[( 521 - 297 ) ÷ 297] x 100 = 75.42%
Formula
Percentage change = [(521 - 297) / 297] x 100
Subtract the new number by the original number
521 - 297 = 224
224 ÷ 297 = 0.7542087542087542
0.7542087542087542 x 100 = 75.42%