-75.41% is the change from 61 to 15
Calculation steps:
[( 15 - 61 ) ÷ 61] x 100 = -75.41%
Formula
Percentage change = [(15 - 61) / 61] x 100
Subtract the new number by the original number
15 - 61 = -46
-46 ÷ 61 = -0.7540983606557377
-0.7540983606557377 x 100 = -75.41%