50.86% is the change from 643 to 970
Calculation steps:
[( 970 - 643 ) ÷ 643] x 100 = 50.86%
Formula
Percentage change = [(970 - 643) / 643] x 100
Subtract the new number by the original number
970 - 643 = 327
327 ÷ 643 = 0.5085536547433903
0.5085536547433903 x 100 = 50.86%