Question 1121726
school fees for each student are 10 dollars a month * 12 months = 120 dollars a year.


pocket money for each student are 2 dollars a day for 40 * 5 = 200 days a year = 400 dollars a year.


two enrichment programs for each student that cost between 35 and 70 dollars each per year will cost between 70 and 140 dollars a year.


maximum cost for the year for each student that receives assistance is 120 + 400 + 140 = 660 a year.


30% of 680 students = 204 students that require assistance.


maximum costs for all 204 students would then be equal to 204 * 660 = 134,640 a year.


chan family net income is 520 a month which is less than 530 a month, so they are eligible for assistance for their 2 children.


school fees for the 2 children will be 120 * 2 = 240 a year.
pocket money for the 2 children will be 400 * 2 = 800 a year.
enrichment program money for the 2 children will be 2 * 2 * 50 = 200 a year.


total money the chan family receives is 1240 a year.


chan family net income is 520 a month * 12 = 6240 a year.


percent of the chan family's net income that they receive in assistance each year is 1240 / 6240 * 100% = 19.87179487% which can be rounded to 19.87% a year.