Figure 2 shows the biomass of adult herring in the North Sea between 1950 and 1990. Too many herring were caught in the 1960s.Calculate the percentage decrease in the biomass of adult herring between 1960 and 1970. Use the equation: Give your answer to the nearest whole number. – 7036

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Q1.

Figure 2 shows the biomass of adult herring in the North Sea between 1950 and 1990.

Too many herring were caught in the 1960s. 

Calculate the percentage decrease in the biomass of adult herring between 1960 and 1970. 

Use the equation:

Give your answer to the nearest whole number.

__________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ __________________________________________________________ 

Percentage decrease = _______________ % (4)

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One thought on “Figure 2 shows the biomass of adult herring in the North Sea between 1950 and 1990. Too many herring were caught in the 1960s.Calculate the percentage decrease in the biomass of adult herring between 1960 and 1970. Use the equation: Give your answer to the nearest whole number. – 7036”

  1. 2.3 million and 0.5 million (figures may be given as 2.25–2.3 and 0.5–0.55)

    Difference = 2.3 − 0.5 = 1.8 million

    Percentage = (difference ÷ original) × 100
    = (1.8 ÷ 2.3) × 100
    ≈ 78.26087…%

    Answer (rounded) = 78%

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