After using
19 of her sugar, Mrs Ang bought another 27 kg of sugar. As a result, Mrs Ang now has
119 as much sugar as what she had at first. How many kilograms of sugar did Mrs Ang have at first?
| |
Sugar |
Total |
| Before |
9 u |
9 u |
| Change 1 |
- 1 u |
|
| After 1 |
8 u |
|
| Change 2 |
+ 27 |
|
| After 2 |
8 u + 27 |
11 u |
Fraction of sugar left after using
19 of it
= 1 -
19 =
89 Amount of sugar left after using some = 8 u
Amount of sugar after buying 27 kg of sugar = 8 u + 27
8 u + 27 = 11 u
11 u - 8 u = 27
3 u = 27
1 u = 27 ÷ 3 = 9
Amount of sugar that Mrs Ang had at first
= 9 u
= 9 x 9
= 81 kg
Answer(s): 81 kg
