296.09% is the change from 128 to 507
Calculation steps:
[( 507 - 128 ) ÷ 128] x 100 = 296.09%
Formula
Percentage change = [(507 - 128) / 128] x 100
Subtract the new number by the original number
507 - 128 = 379
379 ÷ 128 = 2.9609375
2.9609375 x 100 = 296.09%