50.16% is the change from 642 to 964
Calculation steps:
[( 964 - 642 ) ÷ 642] x 100 = 50.16%
Formula
Percentage change = [(964 - 642) / 642] x 100
Subtract the new number by the original number
964 - 642 = 322
322 ÷ 642 = 0.5015576323987538
0.5015576323987538 x 100 = 50.16%