Mark has the option of getting a $300 lens with a 20% discount or a $220 lens.  How much money does he save by buying the cheaper lens?
Марк имконияти харидани линзаи $300 бо 20% тахфиф ё линзаи $220-ро дорад. Вай бо харидани линзаи арзон чанд пул сарфа мекунад?
How much is the discount worth? ** The discount is worth 300*.2=$<<300*.2=60>>60
How much does the lens cost? ** So the lens cost 300-60=$<<300-60=240>>240
How much money does he save by buying the cheaper lens? ** That means he saves 240-220=$<<240-220=20>>20 by buying the cheaper lens
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How much is the discount worth? ** The discount is worth 300*.2=$<<300*.2=60>>60  
How much does the lens cost? ** So the lens cost 300-60=$<<300-60=240>>240  
How much money does he save by buying the cheaper lens? ** That means he saves 240-220=$<<240-220=20>>20  
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Чанд пул арзиши тахфиф аст? ** Тахфиф арзиши 300*.2=$<<300*.2=60>>60  
Линза чанд пул аст? ** Пас линза 300-60=$<<300-60=240>>240 арзиш дорад  
Вай бо харидани линзаи арзон чанд пул сарфа мекунад? ** Ин маънои онро дорад, ки вай 240-220=$<<240-220=20>>20 пул сарфа мекунад, бо харидани линзаи арзон  
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