Loraine Black wants to pay her $1,287.50 annual insurance premium monthly. How much can she save by paying the premium annually?

Percent of Annual Premium
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Monthly Premiums=8.5%
Quarterly Premiums= 25.5%
Semi-Annual Premiums= 50.5%

a) $20.75
b) $18.75
c) $25.78
d) $21.75