 
<translate> A makon farko, itacen ya zubar da ganyayyaki 2 / 5 * 1000 = 400. Adadin ganye da suka rage akan itacen a ƙarshen makon farko shine 1000 - 400 = 600. A mako na biyu, itacen ya zubar da ganye 40 / 100 * 600 = 240. Adadin ganye da suka rage akan itacen shine 600 - 240 = 360. A mako na uku itacen ya zubar da 3 / 4 na ganye, jimlar 3 / 4 * 360 = 270 ganye. Yawan ganye da suka rage akan itacen shine 360 - 270 = 90 ganye. Amsar ƙarshe: 90. <eng> In the first week, the tree shed 2 / 5 * 1000 = 400 leaves. The number of leaves remaining on the tree at the end of the first week is 1000 - 400 = 600. In the second week, the tree shed 40 / 100 * 600 = 240 leaves. The number of leaves remaining on the tree is 600 - 240 = 360. The third week the tree shed 3 / 4 of its leaves, a total of 3 / 4 * 360 = 270 leaves. The number of leaves remaining on the tree is 360 - 270 = 90 leaves. Final answer: 90. 