276.03% is the change from 121 to 455
Calculation steps:
[( 455 - 121 ) ÷ 121] x 100 = 276.03%
Formula
Percentage change = [(455 - 121) / 121] x 100
Subtract the new number by the original number
455 - 121 = 334
334 ÷ 121 = 2.760330578512397
2.760330578512397 x 100 = 276.03%