10/12 - 11/12= i just want to correct my homework.

Ihave this math question 2/3 ÷2 1/10=

What is the equation and solution for the sentence? the sum of a number and thirty-one is one hundred thirteen. write the equation as n-31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and subtract 31 from both sides. the answer is 82. write the equation as n+31=113 and add 31 to both sides. the answer is 144. write the equation as n-31=113 and add 31 to both sides. the answer is 144.

According to the data set, where should the upper quartile line of the box plot be placed?