The amount raised by Cami during last year and in this year have to be compared by putting them in fraction. The start-fraction and end-fraction can be used to reach at the equation.
Given
Amount raised during last year is $45.50
Amount raised this year is 10 End-fraction of the amount
Amount raised last year was [tex]\dfrac{7}{10}[/tex] the amount raised this year.
Let the amount raised this year be n, then the amount raised last year will be 0.7 n.
Therefore the equation will be [tex]45.50 = 0.7 n[/tex] and option D is correct regarding the question.
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