284.62% is the change from 143 to 550
Calculation steps:
[( 550 - 143 ) ÷ 143] x 100 = 284.62%
Formula
Percentage change = [(550 - 143) / 143] x 100
Subtract the new number by the original number
550 - 143 = 407
407 ÷ 143 = 2.8461538461538463
2.8461538461538463 x 100 = 284.62%