-16.13% is the change from 93 to 78
Calculation steps:
[( 78 - 93 ) ÷ 93] x 100 = -16.13%
Formula
Percentage change = [(78 - 93) / 93] x 100
Subtract the new number by the original number
78 - 93 = -15
-15 ÷ 93 = -0.16129032258064516
-0.16129032258064516 x 100 = -16.13%