Originally Posted by

**rn5a** OK...I did the 2nd problem in this way (here Selling Price=SP, Cost Price=CP, Marked Price=MP & Discount %=D%):

SP=1064

D%=5%

MP=(SPx100)/(100-D%)

MP=(1064x100)/(100-5)

MP=1120

Let CP be 100

Thus MP=140

When MP=140, then CP=100

When MP=1120, then CP=1120x100/140=800

Profit=SP-CP

Profit=1064-800=264

What I have done above....is it correct?

& this is how I did the 1st problem:

Let CP be 100

P%=12%

So SP=100+12=112

D%=20%

MP=(SPx100)/(100-D%)

MP=(112x100)/(100-20)

MP=140

Therefore % above CP=(140-100)/100x100=40%

Is it correct?