Model Method - Questions and AnswersQuestion posted by Anissa from the United States: Grade/Level: Grade 5 Question: Mr Ricci spent 1/3 of his salary on food and 2/5 of the remainder on transport. *What fraction of his salary did he have left? Answer: 
Step 2: Since he spent 2/5 of the remainder of his salary on transport, we need to work out the common multiple of 2 (2 remaining units) and 5 (the remainder of his salary is split into 5 equal parts of which 2 parts are spent on transport). The common multiple of 2 and 5 is 10. Thus, we divide the remainder 2 parts into 10 equal parts. 
Step 3: Since 2/5 of the remainder is spent on transport and 2/5 of 10 units is equal to 4 units. Hence, we labelled 4 of the remaining units as spent on transport. 
Step 4: Then, the remaining 6 units will be labelled as "Left" and "$600" as that is the part that represent the amount of his salary left. And since each of the 3 big boxes represent 1/3 of his salary and the second and third big boxes have been divided into 5 units each, we will similarly divide the first big box into 5 small units. 
Step 5: Then, draw a big bracket below the model to represent his total salary which is equal to 15 units. 
From the model, Fraction left = 6 units out of 15 units = 6/15 = 2/5 Therefore, he had 2/5 of his salary left. Also, 6 units ----------> $600 1 unit ----------> $600 / 6 = $100 15 units ----------> 15 X $100 = $1500 Therefore, his salary is $1500. Go To Top - Model Method - Questions and Answers
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