256.93% is the change from 274 to 978
Calculation steps:
[( 978 - 274 ) ÷ 274] x 100 = 256.93%
Formula
Percentage change = [(978 - 274) / 274] x 100
Subtract the new number by the original number
978 - 274 = 704
704 ÷ 274 = 2.5693430656934306
2.5693430656934306 x 100 = 256.93%