• 2021 December(E23) Math Question 57

    Ratios, Proportions, Percentages, Fractions

    - Proportions & Ratios

    Ratios
    Choice E

    It is given that "1 British pound could be exchanged for $2.75", thus:

    1  British  pound=2.75  USD1\; British\; pound=2.75\; USD

    So it follows that 2 British pounds could be exchanged for:

    =>2  British  pounds=2.75  USD×2=5.50  USD=>2\; British\; pounds=2.75\; USD \times 2=5.50\; USD

    It is also given that "1 Canadian dollar could be exchanged for $0.92", thus:

    1  Canadian  dollar=0.92  USD1\; Canadian\; dollar=0.92\; USD

    It follows that 1 USD can be exchanged for:

    1  USD={1}{0.92}  Canadian  dollar1 \; USD=\frac\{1\}\{0.92\} \; Canadian\; dollar

    Therefore, 2 British pounds could be exchanged for:

    2  British  pounds=5.50  USD=5.5×{1}{0.92}    Canadian  dollar≈5.98    Canadian  dollar2\; British\; pounds=5.50\; USD=5.5 \times \frac\{1\}\{0.92\} \; \; Canadian\; dollar\approx 5.98\; \; Canadian\; dollar

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