-2.91% is the change from 721 to 700
Calculation steps:
[( 700 - 721 ) ÷ 721] x 100 = -2.91%
Formula
Percentage change = [(700 - 721) / 721] x 100
Subtract the new number by the original number
700 - 721 = -21
-21 ÷ 721 = -0.02912621359223301
-0.02912621359223301 x 100 = -2.91%