-61.84% is the change from 642 to 245
Calculation steps:
[( 245 - 642 ) ÷ 642] x 100 = -61.84%
Formula
Percentage change = [(245 - 642) / 642] x 100
Subtract the new number by the original number
245 - 642 = -397
-397 ÷ 642 = -0.618380062305296
-0.618380062305296 x 100 = -61.84%