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請您幫我解答這一題數學？
Nov 2nd 2013, 12:34

白米和糙米的重量比是15：7

總共有132公斤

意思是把132公斤分成22份
白米佔了22份中的15份，糙米佔了22份中的7份
 
132÷22=6

可得知1份有6公斤

白米佔了15份，所以白米有6×15=90(公斤)
 
糙米佔了7份，所以糙米有6×7=42(公斤)

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