-91.47% is the change from 938 to 80
Calculation steps:
[( 80 - 938 ) ÷ 938] x 100 = -91.47%
Formula
Percentage change = [(80 - 938) / 938] x 100
Subtract the new number by the original number
80 - 938 = -858
-858 ÷ 938 = -0.9147121535181236
-0.9147121535181236 x 100 = -91.47%