351.63% is the change from 215 to 971
Calculation steps:
[( 971 - 215 ) ÷ 215] x 100 = 351.63%
Formula
Percentage change = [(971 - 215) / 215] x 100
Subtract the new number by the original number
971 - 215 = 756
756 ÷ 215 = 3.516279069767442
3.516279069767442 x 100 = 351.63%