 
 <translate> 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. <ibo> N'izu nke mbụ, osisi ahụ ga-agbaji akwụkwọ 2 / 5 * 1000 = 400. Ọnụ ọgụgụ akwụkwọ fọdụrụ n'osisi ahụ ná ngwụsị izu mbụ bụ 1000 - 400 = 600. N'izu nke abụọ, osisi ahụ tụfuru akwụkwọ 40 / 100 * 600 = 240. Ọnụ ọgụgụ akwụkwọ fọdụrụ n'osisi ahụ bụ 600 - 240 = 360. N'izu nke atọ, osisi ahụ ga-efopụ otu ụzọ n'ụzọ anọ nke akwụkwọ ya, nke pụtara na ọ ga-efopụ otu ụzọ n'ụzọ anọ n'ụzọ atọ nke akwụkwọ ya ma ọ bụrụ na e jiri narị atọ na iri isii tụnyere ya. Ọnụ ọgụgụ akwụkwọ fọdụrụ n'osisi ahụ bụ 360 - 270 = 90 akwụkwọ. Azịza ikpeazụ: 90. 