Question

Last winter Armand had StartFraction 5 Over 6 EndFraction of a row of stacked logs. At the end of the winter he had StartFraction 8 Over 15 EndFraction of the same row left. How much wood did he burn over the winter?

1 and StartFraction 9 Over 16 EndFraction rows
1 and StartFraction 11 Over 30 EndFraction rows
StartFraction 4 Over 9 EndFraction row
StartFraction 3 Over 10 EndFraction row

Answer 1

so what you think what you need to do with these rows to get the correct answer ?

Answer 2

he started with 5/6 of one row
at the end of the winter, he had 8/15 left

to find the amount he used during the winter, subtract starting amount - final amount

or in terms of numbers

\[\frac{ 5 }{ 6 }-\frac{ 8 }{ 15 }\]

in order to do this, find the least common multiple of 6 and 15. this will become your new denominator. change both denominators to the new common denominator through multiplication. then subtract across the numerators, keeping the same denominator in the final fraction.