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In 2017, a chocolate bar had a mass of 250g - OCR - GCSE Maths - Question 4 - 2019 - Paper 1

Question 4

In 2017, a chocolate bar had a mass of 250g. In 2018, the mass of the chocolate bar was reduced to 220g. Work out the percentage decrease in the mass of the chocolat... show full transcript

Worked Solution & Example Answer:In 2017, a chocolate bar had a mass of 250g - OCR - GCSE Maths - Question 4 - 2019 - Paper 1

Step 1

Calculate the decrease in mass

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Answer

To find the decrease in mass, subtract the mass in 2018 from the mass in 2017:

ext{Decrease in mass} = ext{Mass in 2017} - ext{Mass in 2018} = 250g - 220g = 30g

Step 2

Calculate the percentage decrease

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Answer

To find the percentage decrease, use the formula:

ext{Percentage decrease} = rac{ ext{Decrease in mass}}{ ext{Mass in 2017}} imes 100 o

Substituting the values we calculated:

ext{Percentage decrease} = rac{30g}{250g} imes 100 = 12 ext{%}

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