80% = 0.80
12 x 0.80 = 12 x 4/5 = 48/5 = $9.60
80% markup = 12+9.60 = $21.60
Lele D.
asked 02/14/2280% = 0.80
12 x 0.80 = 12 x 4/5 = 48/5 = $9.60
80% markup = 12+9.60 = $21.60
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