284.85% is the change from 99 to 381
Calculation steps:
[( 381 - 99 ) ÷ 99] x 100 = 284.85%
Formula
Percentage change = [(381 - 99) / 99] x 100
Subtract the new number by the original number
381 - 99 = 282
282 ÷ 99 = 2.8484848484848486
2.8484848484848486 x 100 = 284.85%