Online animation provides an introduction to ratio and equivalent ratios. *4*Math lesson also provides limited sample questions at the end of the topic.*4**4**1*RATIO AND EQUIVALENT RATIOS*2*Explains a ratio is a comparison of two numbers by division.*4*Explains ratio is written in the following way 4:5 (with a colon separating the two numbers)*4*Explains to calculate an equivalent ratio you must multiply or divide the left hand side by the same numbers as the right hand side.*4**4**4*Useful for teachers of maths.