The ratio of cost to net profit of fish farming is 3:5. How much can Uncle Li earn by contracting this fish pond? (Keep integer)
This question is wrong, there is no cost, how to make money?
The ratio of Xiao Ming and Xiao Hong collecting stamps is 5:6. After Xiaoming gave Xiaohong 10, the proportion of stamps they collected became 4:5. How many stamps do Xiaoming and Xiaohong have?
10÷5/(5+6)-4/(4+5)
= 10÷5/ 1 1-4/9
= 10÷ 1/99
=990 sheets
Xiao Zhang of Obana has saved some pocket money, and their saving ratio is 5:3. Once they bought extra-curricular books in a bookstore, Xiaohua used 26 yuan and Xiao Zhang spent 10 yuan. At this time, their remaining money is equal. How much does Xiaohua have?
(26- 10)÷( 1-3/5)
= 16÷2/5
=40 yuan