After using
45 of her curry powder, Mrs Tan bought another 12 kg of curry powder. As a result, Mrs Tan now has
75 as much curry powder as what she had at first. How many kilograms of curry powder did Mrs Tan have at first?
| |
Curry Powder |
Total |
| Before |
5 u |
5 u |
| Change 1 |
- 1 u |
|
| After 1 |
1 u |
|
| Change 2 |
+ 12 |
|
| After 2 |
1 u + 12 |
7 u |
Fraction of curry powder left after using
45 of it
= 1 -
45 =
15 Amount of curry powder left after using some = 1 u
Amount of curry powder after buying 12 kg of curry powder = 1 u + 12
1 u + 12 = 7 u
7 u - 1 u = 12
6 u = 12
1 u = 12 ÷ 6 = 2
Amount of curry powder that Mrs Tan had at first
= 5 u
= 5 x 2
= 10 kg
Answer(s): 10 kg
