Name: Date:

Question 1: Purple paint is made from using red and blue paint in the ratio 3 : 8. Write an equation for x in terms of y to show the relationship between the amount of blue paint (x) and the amount of red paint (y). |

Question 2: Amy and Barbara share out money in the ratio 4 : 5. Write an equation for B in terms of A to show the relationship between the amounts of money received by Amy (A) and Barbara (B). |

Question 3: The ratio of mushrooms to cheese on a pizza is 5 : 6. Write an equation for c in terms of m to show the relationship between the amount of mushrooms (m) and cheese (c). |

Question 4: A shop sells CDs and DVDs in the ratio 3 : 5. Write an equation for d in terms of c to show the relationship between the amounts of CDs (c) and DVDs (d). |

Question 5: The ratio of boys to girls joining a secondary school are 2 : 5. Write an equation for g in terms of b to show the relationship between the amount of boys (b) and girls (g). |

Question 6: A copper alloy is made by mixing zinc and copper in the ratio 2 : 9. Write an equation for z in terms of c to show the relationship between the amounts of zinc (z) and copper (c). |

Question 7: Anne, Ben and Charlie share sweets in the ratio 8 : 3 : 4. Write an equation for C in terms of B to show the relationship between the amounts of sweets received by Ben (B) and Charlie (C). |

Question 8: The ratio of mango, pineapple and apple in a fruit salad is 6 : 2 : 7. Write an equation for p in terms of a to show the relationship between the amounts of pineapple (p) and apple (a). |

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# Answers

Question 1: x={\Large\frac{3}{8}}y |

Question 2: B={\Large\frac{4}{5}}A |

Question 3: c={\Large\frac{5}{6}}m |

Question 4: d={\Large\frac{3}{5}}c |

Question 5: g={\Large\frac{2}{5}}b |

Question 6: z={\Large\frac{9}{2}}c |

Question 7: C={\Large\frac{3}{4}}B |

Question 8: p={\Large\frac{7}{2}}a |