-80.26% is the change from 76 to 15
Calculation steps:
[( 15 - 76 ) ÷ 76] x 100 = -80.26%
Formula
Percentage change = [(15 - 76) / 76] x 100
Subtract the new number by the original number
15 - 76 = -61
-61 ÷ 76 = -0.8026315789473685
-0.8026315789473685 x 100 = -80.26%