exercise: inversely proportional word problem 1
8 workmen need 15 days to build a new house.
How many workmen are needed to build the house in 10 days?
answer: inversely proportional word problem 1
1. step: proportion
* 15 days – 8 workmen
:10 days – x workmen
2. step: which proportion?
↓ less days ↑more workmen = inverse proportion
3. step: formula
x = 8 * 15 : 10
x = 12 workmen
4. step: answer
12 workmen are needed.