-92.99% is the change from 642 to 45
Calculation steps:
[( 45 - 642 ) ÷ 642] x 100 = -92.99%
Formula
Percentage change = [(45 - 642) / 642] x 100
Subtract the new number by the original number
45 - 642 = -597
-597 ÷ 642 = -0.9299065420560748
-0.9299065420560748 x 100 = -92.99%