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Exchange Rates Flashcards
GCSE Mathematics (Edexcel) 1MA1
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Exchange rate
The value of one currency compared to another, used to convert between currencies.
Currency conversion formula
Amount in new currency = Amount in original currency × Exchange rate.
Converting from pounds to another currency
Multiply the amount in pounds by the exchange rate.
Converting from another currency to pounds
Divide the amount in the foreign currency by the exchange rate.
Inverse exchange rate
The exchange rate for converting back to the original currency (e.g., if £1 = $1.20, then $1 = £1 ÷ 1.20).
Exchange rate example
If £1 = €1.15, to convert £50 to euros: 50 × 1.15 = €57.50.
Reverse exchange rate example
If £1 = €1.15, to convert €57.50 to pounds: 57.50 ÷ 1.15 = £50.
Rounding in currency conversion
Always round to 2 decimal places, as currency is usually given to the nearest penny or cent.
Commission in currency exchange
A fee charged by a bureau de change or bank for converting currency, often a percentage of the amount exchanged.
Worded problems with exchange rates
Read the question carefully to determine whether to multiply or divide by the exchange rate, and check for any additional fees or commissions.

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