Discounting Of Bills

What rate per cent does Shantanu get for his money when in discounting a bill due 30 months hence he deducts 30% of the amount of the bill ?

What rate % does a man get for his money when in discounting a bill due 10 months hence: he deducts 10% of the amount of the bill.

The true discount on a bill of ? 900 is ? 100. Find the banker's discount.

The present worth of a bill due sometime, hence is X 2200 and true discount on the bill is X 220. Find the banker's discount and banker's gain.

The present worth of a bill due sometime hence is Rs 1100 and the true discount on the bill is Rs 110. Find the banker discount and the bankers gain