Multi-step PSLE-style reasoning
Question
A tank was 3/8 full. After 18 litres of water were added, it became 5/8 full. What is the capacity of the tank?
Ruiya's start
The water increased from 3/8 to 5/8, so the increase is 2/8 of the tank. This 2/8 is 18 litres. What is 1/8?
