256.57% is the change from 274 to 977
Calculation steps:
[( 977 - 274 ) ÷ 274] x 100 = 256.57%
Formula
Percentage change = [(977 - 274) / 274] x 100
Subtract the new number by the original number
977 - 274 = 703
703 ÷ 274 = 2.565693430656934
2.565693430656934 x 100 = 256.57%