CP of 1 toffees = 665/175 = Rs. 3.8
SP of 1 toffees for 40% profit = 3.8*1.40 = Rs. 5.32
So in 665 Rupess number of toffees to be sold = 665/5.32 = 125
Arithmetic is numbers you squeeze from your head to your hand to your pencil to your paper till you get the answer.
Carl Sandburg
Students attend our lectures, not because the mathematics we teach ‘makes lots of fun’ for us, but because they believe they can learn some essential knowledge from us. And each of our young students has only one life to live. We should therefore be a