-77.17% is the change from 438 to 100
Calculation steps:
[( 100 - 438 ) ÷ 438] x 100 = -77.17%
Formula
Percentage change = [(100 - 438) / 438] x 100
Subtract the new number by the original number
100 - 438 = -338
-338 ÷ 438 = -0.771689497716895
-0.771689497716895 x 100 = -77.17%