215.76% is the change from 165 to 521
Calculation steps:
[( 521 - 165 ) ÷ 165] x 100 = 215.76%
Formula
Percentage change = [(521 - 165) / 165] x 100
Subtract the new number by the original number
521 - 165 = 356
356 ÷ 165 = 2.1575757575757577
2.1575757575757577 x 100 = 215.76%