we count parts
10 meat
9 rice
5 vegetables
sum 10 + 9 + 5 = 24 parts
10/24 meat
9/24 rice
5/24 vegetables
Prices determine multiplying 60,000 by a fixed value of the fraction
60.000 10/24 = 600 000/24 = 25 000 meat
60 000 9/24 = 540 000/24 = 22 500 rice
60 000 * 5 = 300 000/24 = 12 500 vegetables
check 25 000 + 22 500 + 12 500 = 60 000
