ক্রয়মূল্য ও বিক্রয়মূল্যের অনুপাত 4:5 হলে, শতকরা লাভ নির্ণয় করাে।
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Step-by-step explanation:
croymullo = 4 / 4+5
= 4/9
sotkora lav = 4/9 × 100
= 400/9
= 4.45
bikroymullo = 5/9
sotkora lav = 5/9 ×100 = 500/9 = 5.56
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