-91.45% is the change from 351 to 30
Calculation steps:
[( 30 - 351 ) ÷ 351] x 100 = -91.45%
Formula
Percentage change = [(30 - 351) / 351] x 100
Subtract the new number by the original number
30 - 351 = -321
-321 ÷ 351 = -0.9145299145299145
-0.9145299145299145 x 100 = -91.45%