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There is a third small problem in the sixth grade math problem, such as the problem of calculation.
Answer and analysis

If the original total deposit of two people is 1, naughty deposits account for 8/ 15, and smiles account for 7/ 15.

After the naughty withdrawal of 25%, the remaining deposits account for 8/ 15×( 1-25%)=2/5 of the total.

Because less deposit in 50 yuan is more naughty than 90 yuan, less deposit in 50 yuan is more naughty than 90-50 after cash withdrawal. 25% = 40 yuan.

So the result is that the total deposit of two people is 40÷[7/ 15-2/5]=600 yuan.

Xiaoxiao's original deposit is 600x 7/ 15=280 yuan, and naughty original deposit is 600-280=320 yuan.

Xiaoxiao's current deposit is 280+50=330 yuan, and naughty current deposit is 320x75%=240 yuan.

1 Smile The original deposit is 280-240 more than the current naughty bag deposit = 40 yuan.

2 The ratio of the naughty boy's current deposit to Xiaoxiao's original deposit is 240: 280 = 6: 7.

The original deposit of the naughty boy was 320 yuan. (For the process, see above)