First let's convert the rates to make them comparable:
Bid is the price at which the dealer buys and you sells while
ask is the price at which the dealer sells and you buy.
- At 0.7855 the Dealer buys $1 and you sell it
- So this is a bid rate for $
- When dealer buys $ he sells Pound so it is also the ask for
Pounds
- If 0.7855 pounds buy $1 so how many $ are needed to buy 1 pound
- 1/0.7855 = $1.2731
- So 1 pound will get $1.2731
- At 0.7925 the Dealer sells $1 and you buy it
- So this is a ask rate for $
- When dealer sells $ he buys Pound so it is also the bid for
Pounds
- If 0.7925 pounds buy $1 so how many $ are needed to buy 1 pound
- 1/0.7925 = $1.2618
- So 1 pound will get $1.2618
- So the Bid ask quote is 1.2618-1.2731
- While the rate in the other market is 1.4475- 1.4755.
- This is the rate for pounds.
- the dealer buys pounds for 1.4475 and the dealer sells the
pound for 1.4755
- When the dealer buys pound he sells $ and when he sells pound
he will buy $
- It is better to buy dollar and sell pound so the dealer will
buy pound and sell the dollar
- So we have to look at the bid rate of 0.7855
- The $ rate will be 1.2731
- So you sell the $ at 1.4755 and the dealer buys $