What is happening
You arrive at a pizza kitchen scaling a recipe from four slices to twenty.
The old tray was cut into four and three parts were cheese. The new tray is cut into twenty and nobody knows how many parts to cover.
Equivalent fractionsRunning
Quarters scaled up
6.4parts
Twentieths needed
60parts
Fraction wheel. Cheese pieces at 2 pieces. Quarters scaled up 6.4 parts, Twentieths needed 60 parts. Currently quarters scaled up is short by 53.6 parts.
What has to balance