maths % problem?

This item appeared in a newspaper

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Cows produce 3% more milk

A farmer found that when his cow listened to classical

music the milk it produced increased by 3%.

This increase of 3% represented 0.72 litres of milk.

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calculate the amount of milk produced by the cow when it listened to classical music

Comments

  • let the total milk produced = x

    3x/100 = 0.72

    x = 72/3

    x = 24litres

    when it listened to classical music:

    24+0.72 = 24.72 litres

  • The total amount of milk produced with 3% = 0.72 of a litre.

    The single cow's total produced quantity of milk is 103% as it produced 3% extra on top of 100%.

    You can solve this many ways. 0.72/3 = 1%, which could be multiplied by 103 to get the/your answer. 0.72/3 is also the number that 3 must be multiplied by to achieve the number 0.72. this same number multiplied by 103 would give the litres in 103%, or in other words, your answer.

    You computer probobly has a calculator feature/program if you're missing one.

  • This increase of 3% represented 0.72 litres of milk.

    So, initial milk produced is 0.72 *100/3= 24 lit

    milk produced by the cow when it listened to classical music

    is 24 + 3% of 24= 24.72 liters.

  • 3% = 0∙72 L (÷ 3)

    1% = 0∙24 L (x 103)

    103% = 24∙72 L

  • 0.72/3 x 100

    24 litres (original amount)

    add 0.72 to the amount to get the amount of milk produced when listening to music

    24 + 0.72 = 24.72 litres

  • .72 divided by .03

    = 24 litres

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