Which of the following is incorrect?

By how many minutes is \( 3\dfrac{2}{3} \) longer than \( 1\dfrac{1}{12}\) ?

How many times is a bag with a mass 2 ⅖ kg as heavy as bag with a mass of 300 g?

Andrew is using a wooden strip \( \dfrac{9}{16}\) m long to make a picture frame. If he cuts off a piece that is \( \dfrac{3}{8}\) m long, which fraction best represents the portion is left of the original strip?

Box A and Box B had a total of 1334 marbles. \( \dfrac{3}{13} \) of the marbles in Box A were lost and\( \dfrac{3}{8} \) of the marbles in Box B was lost. As a result, there was an equal number of marbles left in both boxes.

How many marbles were there in Box A at first?

A grocery shopkeeper had some potatoes. He sold two-fifths of the potatoes and bought another 20kg of potatoes. He had \( \dfrac{13}{5} \) as many potatoes as he had at the beginning, How many kilograms of potatoes did he have at first?

Terry sold some mangoes during the two days’ veggie market. He sold 150 mangoes on Monday, ⅜ of which was remaining on Tuesday. 120 mangoes were left. How many mangoes did he have at first?