-59.1% is the change from 670 to 274
Calculation steps:
[( 274 - 670 ) ÷ 670] x 100 = -59.1%
Formula
Percentage change = [(274 - 670) / 670] x 100
Subtract the new number by the original number
274 - 670 = -396
-396 ÷ 670 = -0.591044776119403
-0.591044776119403 x 100 = -59.1%