247.33% is the change from 150 to 521
Calculation steps:
[( 521 - 150 ) ÷ 150] x 100 = 247.33%
Formula
Percentage change = [(521 - 150) / 150] x 100
Subtract the new number by the original number
521 - 150 = 371
371 ÷ 150 = 2.473333333333333
2.473333333333333 x 100 = 247.33%