-14.88% is the change from 840 to 715
Calculation steps:
[( 715 - 840 ) ÷ 840] x 100 = -14.88%
Formula
Percentage change = [(715 - 840) / 840] x 100
Subtract the new number by the original number
715 - 840 = -125
-125 ÷ 840 = -0.1488095238095238
-0.1488095238095238 x 100 = -14.88%