Question

During 2003,production decrease by 25% but during 2004 production increase by 40%of what it was at the bigning of 2004 .calculate resulting change in production during these two year

Answer 1

Let the production before 2003 be x

Then,
Production in 2003 =(100%-25%)x=75%x=3/4x

Production in 2004 =(100%+40%)75%x
=140%(75%)x
=140/100×75/100(x)
=7/5×3/4(x)

Change in production =(7/5×3/4(x)) - (3/4(x))
=21/20(x)-15/20(x)
=3/10(x)

Percentage increase =3/10(x)×100
=30%x

Therefore there is a +30% change in production

Hope its useful