-2.1% is the change from 715 to 700
Calculation steps:
[( 700 - 715 ) ÷ 715] x 100 = -2.1%
Formula
Percentage change = [(700 - 715) / 715] x 100
Subtract the new number by the original number
700 - 715 = -15
-15 ÷ 715 = -0.02097902097902098
-0.02097902097902098 x 100 = -2.1%