-94.7% is the change from 283 to 15
Calculation steps:
[( 15 - 283 ) ÷ 283] x 100 = -94.7%
Formula
Percentage change = [(15 - 283) / 283] x 100
Subtract the new number by the original number
15 - 283 = -268
-268 ÷ 283 = -0.9469964664310954
-0.9469964664310954 x 100 = -94.7%