Jason had 3/4 pound of salami. He used 1/3 pound for sandwiches.How many pounds of salami does he have left?

Question

snowfire · Answer

Find the LCD and then subtract.

jdoe0001 · Answer

$\bf \cfrac{3}{4}-\cfrac{1}{3}=\cfrac{\square -\square }{{\bbox[2pt,white, border: 2px solid black]{  \text{LCD}  }}}$

jdoe0001 · Answer

what would be the LCD?

anonymous · Answer

12?

jdoe0001 · Answer

yeap... so it's 12... so $\bf \cfrac{3}{4}-\cfrac{1}{3}=\cfrac{(12\div 4\cdot 3)-(12\div 3\cdot 1)}{12}$

anonymous · Answer

??? im lost :/

jdoe0001 · Answer

lost?   what part?

anonymous · Answer

=(12÷4⋅3)−(12÷3⋅1)
                   12

jdoe0001 · Answer

yeap... you divide the denominator of the fraction by the LCD, and the result of that, you multiply times the numerator of the same fraction

jdoe0001 · Answer

thus, tis how you'd add/subtract any fractions

jdoe0001 · Answer

$\bf \cfrac{(12\div 4\cdot 3)-(12\div 3\cdot 1)}{12}\implies \cfrac{(3\cdot 3)-(4\cdot 1)}{12}\implies \cfrac{9-4}{12}\implies \cfrac{5}{12}$

anonymous · Answer

ok thank you

jdoe0001 · Answer

yw