-2.54% is the change from 670 to 653
Calculation steps:
[( 653 - 670 ) ÷ 670] x 100 = -2.54%
Formula
Percentage change = [(653 - 670) / 670] x 100
Subtract the new number by the original number
653 - 670 = -17
-17 ÷ 670 = -0.025373134328358207
-0.025373134328358207 x 100 = -2.54%