217.59% is the change from 307 to 975
Calculation steps:
[( 975 - 307 ) ÷ 307] x 100 = 217.59%
Formula
Percentage change = [(975 - 307) / 307] x 100
Subtract the new number by the original number
975 - 307 = 668
668 ÷ 307 = 2.175895765472313
2.175895765472313 x 100 = 217.59%