This worksheet allows learners to practise converting ratios to the form 1:n and n:1 as well as solve problems using the unitary method. Sections A and B ask for some ratios in the form a:b to be written in the form 1:n and n:1. Section C then asks for ratios in unitary form to be simplified. Section D then links the unitary form to exchange rates by requiring some in the form 1:n to be converted to n:1. Section E then brings in the link with map scales and different units. Section F ends the worksheet with some problems that lend themselves to being solved via a unitary method.