# Fraction Rule Prototype

- Author:
- Arthur Lee

See my note for this design.
https://www.evernote.com/l/AANixlN2YJdLQ5J9YX8_QlEPpjeOQfCG5s8

## Applet 1

Each applet consists of two quantity bars (Q1 and Q2) and a 'fraction rule' (a list of vertical lines marking units and sub-units based on Q1). The model basically shows Q2 as a fractional multiple of Q1, i.e. Q2=pQ1, where p is a fraction.
Click 'switch' to show the point that can change the unit from Q1 to Q2. This allows reading Q1 as a multiple of Q2 instead.
In this applet, Q1 and Q2 can be changed independently.

## Applet 2

Q2 is confined to fractional multiples of Q1.

## Applet 3

Q1 and Q2 are specific fractions.
This is a zoomed in version for easier observation when Q1 is a fraction.
Q1 and Q2 are confined to certain fractions depending on the 'denominator' controlled by the slider. In the following example, they are multiples of ¼.