Using the notation Pt to designate this period's price level and Pt-1 to designate last period's price level, the formula for measuring the inflation rate from last period to this period is
A) [(Pt - Pt - 1 ) / Pt] × 100.
B) [(Pt -1 - Pt) / Pt - 1] × 100.
C) [(Pt - Pt - 1 ) / Pt - 1] × 100.
D) [(Pt -1 - Pt) / Pt] × 100.
C
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