-77.38% is the change from 641 to 145
Calculation steps:
[( 145 - 641 ) ÷ 641] x 100 = -77.38%
Formula
Percentage change = [(145 - 641) / 641] x 100
Subtract the new number by the original number
145 - 641 = -496
-496 ÷ 641 = -0.7737909516380655
-0.7737909516380655 x 100 = -77.38%