Ratios

And here a few more ratio sheets:

Part shows that ratios are equivalent fractions.

A few show an alternative way of calculating ratios, considered how early farmers or craftsmen used to calculate ratios: They first divided down to the factor for one unit, then multiplied up to their answer. This method is more intuitive than the bare cross multiply and divide method. It's divide, then multiply.

And some problems for adjusting recipes, and for teachers to readjust (weight) marks for students.