942% is the change from 50 to 521
Calculation steps:
[( 521 - 50 ) ÷ 50] x 100 = 942%
Formula
Percentage change = [(521 - 50) / 50] x 100
Subtract the new number by the original number
521 - 50 = 471
471 ÷ 50 = 9.42
9.42 x 100 = 942%
Example