256.85% is the change from 146 to 521
Calculation steps:
[( 521 - 146 ) ÷ 146] x 100 = 256.85%
Formula
Percentage change = [(521 - 146) / 146] x 100
Subtract the new number by the original number
521 - 146 = 375
375 ÷ 146 = 2.5684931506849313
2.5684931506849313 x 100 = 256.85%