277.82% is the change from 257 to 971
Calculation steps:
[( 971 - 257 ) ÷ 257] x 100 = 277.82%
Formula
Percentage change = [(971 - 257) / 257] x 100
Subtract the new number by the original number
971 - 257 = 714
714 ÷ 257 = 2.7782101167315174
2.7782101167315174 x 100 = 277.82%