randFromArray([2, 3, 10]) randRange(1, 3) M === 10 ? 10 : randRange(2, 4) A * M B * M randVar()

What number could replace `SYMBOL` below?

`\dfrac{A}{B} = \dfrac{SYMBOL}{D}`

C

The fraction on the left represents A out of B slices of a rectangular pizza( 1 ).

init({ range: [ [0, 1], [0, 1] ], scale: [475, 25] }); rectchart( [A, B - A], [RED, GRAY] );

What if we cut the pizza( 1 ) into D slices instead? How many slices would result in the same amount of pizza( 1 )?

init({ range: [ [0, 1], [0, 1] ], scale: [475, 25] }); rectchart( [0, D], [RED, GRAY] );

We would need C slices.

init({ range: [ [0, 1], [0, 1] ], scale: [475, 25] }); rectchart( [C, D - C], [RED, GRAY] );

`\dfrac{A}{B} = \dfrac{C}{D}` and so the answer is `C`.

Another way to get the answer is to multiply by `\dfrac{M}{M}`.

`\dfrac{M}{M} = \dfrac{1}{1} = 1` so really we are multiplying by 1.

The final equation is: `\dfrac{A}{B} \times \dfrac{M}{M} = \dfrac{C}{D}` so our answer is `C`.

What number could replace `SYMBOL` below?

`\dfrac{A}{B} = \dfrac{C}{SYMBOL}`

D

The fraction on the left represents A out of B slices of a rectangular pizza( 1 ).

init({ range: [ [0, 1], [0, 1] ], scale: [475, 25] }); rectchart( [A, B - A], [RED, GRAY] );

How many total slices would we need if we want the same amount of pizza( 1 ) in C slices?

init({ range: [ [0, 1], [0, 1] ], scale: [475, 25] }); rectchart( [C, D - C], [RED, GRAY] );

We would need to cut the pizza( 1 ) into D slices.

init({ range: [ [0, 1], [0, 1] ], scale: [475, 25] }); rectchart( [C, D - C], [RED, GRAY] );

`\dfrac{A}{B} = \dfrac{C}{D}` and so the answer is `D`.

Another way to get the answer is to multiply by `\dfrac{M}{M}`.

`\dfrac{M}{M} = \dfrac{1}{1} = 1` so really we are multiplying by 1.

The final equation is: `\dfrac{A}{B} \times \dfrac{M}{M} = \dfrac{C}{D}` so our answer is `D`.