Use compatible numbers to estimate the quotient? 474÷9

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

How is working backward similar to solving an equation?

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error