Write $30$30 to $70$70 as a fully simplified ratio.
Write $300$300 to $350$350 as a fully simplified ratio.
Write $21$21 to $12$12 as a fully simplified ratio.
Write $\frac{3}{4}$34 to $\frac{7}{12}$712 as a fully simplified ratio.
Solve a range of problems involving rates and ratios, including distancetime problems for travel at a constant speed, with and without digital technologies