After using
18 of her curry powder, Mrs Yee bought another 20 kg of curry powder. As a result, Mrs Yee now has
98 as much curry powder as what she had at first. How many kilograms of curry powder did Mrs Yee have at first?
| |
Curry Powder |
Total |
| Before |
8 u |
8 u |
| Change 1 |
- 1 u |
|
| After 1 |
7 u |
|
| Change 2 |
+ 20 |
|
| After 2 |
7 u + 20 |
9 u |
Fraction of curry powder left after using
18 of it
= 1 -
18 =
78 Amount of curry powder left after using some = 7 u
Amount of curry powder after buying 20 kg of curry powder = 7 u + 20
7 u + 20 = 9 u
9 u - 7 u = 20
2 u = 20
1 u = 20 ÷ 2 = 10
Amount of curry powder that Mrs Yee had at first
= 8 u
= 8 x 10
= 80 kg
Answer(s): 80 kg
