Researchers have argued that there are strong links between primary school students' competence with fraction concepts and operations and their algebraic readiness. This study involving 162 Years 5/6 students in three primary schools examined the strength of that relationship using a test based on familiar fraction tasks and a test of algebraic thinking utilising number relations and equivalence. A strong relationship was found between the two, and with some fraction tasks embodying high potential to anticipate algebraic thinking.