Question

Jamal is making pancakes. He has 6 3/4 cups of batter, but he needs a total of 12 cups. How much more batter does jamal need

Answer 1

12-6.75=5.25 5 1/4 cups

Answer 2

Data:

x (batter number) = ?

Solving:


`x + 6 (3)/(4) = 12`

`x = 12 - 6 (3)/(4)`

`x = 12 - (4*6+3)/(4)`

`x = 12 - (24+3)/(4)`

`x = 12 - (27)/(4)`
least common multiple (LCM) = 4, Will be the denominator:

`x = 12 - (27)/(4)`

`(4/1*x)/(4) = (4/1*12)/(4) - (4/4*27)/(4)`

`(4x)/(\diagup\!\!\!\!4) = (48)/(\diagup\!\!\!\!4) - (27)/(\diagup\!\!\!\!4)`

`4x = 48 - 27`

`4x = 21`

`x = (21)/(4)`
Transform into mixed fraction

........................21 |_4_← denominator
....numerator→(1)....5 ← whole number


Therefore, We have:

`x = (21)/(4) =\boxed{ 5 (1)/(4) }`

Answer:
Jamal need
`5(1)/(4)` cups of batter