-35.11% is the change from 994 to 645
Calculation steps:
[( 645 - 994 ) ÷ 994] x 100 = -35.11%
Formula
Percentage change = [(645 - 994) / 994] x 100
Subtract the new number by the original number
645 - 994 = -349
-349 ÷ 994 = -0.35110663983903423
-0.35110663983903423 x 100 = -35.11%