150.5% is the change from 200 to 501
Calculation steps:
[( 501 - 200 ) ÷ 200] x 100 = 150.5%
Formula
Percentage change = [(501 - 200) / 200] x 100
Subtract the new number by the original number
501 - 200 = 301
301 ÷ 200 = 1.505
1.505 x 100 = 150.5%
Example