Math Problem Statement
На покупку костюма покупатель израсходовал 45% имевшейся у него суммы, на покупку обуви - имевшейся суммы, а остальное потратил на подарки. Сколько денег покупатель потратил на подарки, если первоначально у него было 30000 рублей.
Solution
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Math Problem Analysis
Mathematical Concepts
Percentages
Proportions
Subtraction
Formulas
Percentage formula: (part/whole) * 100
Proportion formula: Remaining amount = Initial amount - (Percentage spent)
Theorems
-
Suitable Grade Level
Grades 5-7
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