After using
27 of her chicken powder, Mrs Cheong bought another 28 kg of chicken powder. As a result, Mrs Cheong now has
97 as much chicken powder as what she had at first. How many kilograms of chicken powder did Mrs Cheong have at first?
|
Chicken Powder |
Total |
Before |
7 u |
7 u |
Change 1 |
- 1 u |
|
After 1 |
5 u |
|
Change 2 |
+ 28 |
|
After 2 |
5 u + 28 |
9 u |
Fraction of chicken powder left after using
27 of it
= 1 -
27 =
57 Amount of chicken powder left after using some = 5 u
Amount of chicken powder after buying 28 kg of chicken powder = 5 u + 28
5 u + 28 = 9 u
9 u - 5 u = 28
4 u = 28
1 u = 28 ÷ 4 = 7
Amount of chicken powder that Mrs Cheong had at first
= 7 u
= 7 x 7
= 49 kg
Answer(s): 49 kg