-79.44% is the change from 642 to 132
Calculation steps:
[( 132 - 642 ) ÷ 642] x 100 = -79.44%
Formula
Percentage change = [(132 - 642) / 642] x 100
Subtract the new number by the original number
132 - 642 = -510
-510 ÷ 642 = -0.794392523364486
-0.794392523364486 x 100 = -79.44%