-78.26% is the change from 69 to 15
Calculation steps:
[( 15 - 69 ) ÷ 69] x 100 = -78.26%
Formula
Percentage change = [(15 - 69) / 69] x 100
Subtract the new number by the original number
15 - 69 = -54
-54 ÷ 69 = -0.782608695652174
-0.782608695652174 x 100 = -78.26%