-89.21% is the change from 278 to 30
Calculation steps:
[( 30 - 278 ) ÷ 278] x 100 = -89.21%
Formula
Percentage change = [(30 - 278) / 278] x 100
Subtract the new number by the original number
30 - 278 = -248
-248 ÷ 278 = -0.8920863309352518
-0.8920863309352518 x 100 = -89.21%