52.18% is the change from 642 to 977
Calculation steps:
[( 977 - 642 ) ÷ 642] x 100 = 52.18%
Formula
Percentage change = [(977 - 642) / 642] x 100
Subtract the new number by the original number
977 - 642 = 335
335 ÷ 642 = 0.5218068535825545
0.5218068535825545 x 100 = 52.18%