334.85% is the change from 66 to 287
Calculation steps:
[( 287 - 66 ) ÷ 66] x 100 = 334.85%
Formula
Percentage change = [(287 - 66) / 66] x 100
Subtract the new number by the original number
287 - 66 = 221
221 ÷ 66 = 3.3484848484848486
3.3484848484848486 x 100 = 334.85%