Question
In a school field, 25 of the pupils wore cardigans. After 50 pupils who wore cardigans left the school field, the percentage of pupils who wore cardigans decreased to 10%. How many pupils in the school field did not wear cardigans?
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In a school field, 25 of the pupils wore cardigans. After 50 pupils who wore cardigans left the school field, the percentage of pupils who wore cardigans decreased to 10%. How many pupils in the school field did not wear cardigans?