-87.65% is the change from 243 to 30
Calculation steps:
[( 30 - 243 ) ÷ 243] x 100 = -87.65%
Formula
Percentage change = [(30 - 243) / 243] x 100
Subtract the new number by the original number
30 - 243 = -213
-213 ÷ 243 = -0.8765432098765432
-0.8765432098765432 x 100 = -87.65%