-92.93% is the change from 721 to 51
Calculation steps:
[( 51 - 721 ) ÷ 721] x 100 = -92.93%
Formula
Percentage change = [(51 - 721) / 721] x 100
Subtract the new number by the original number
51 - 721 = -670
-670 ÷ 721 = -0.9292649098474342
-0.9292649098474342 x 100 = -92.93%