Question
Opal bought a total of 220 big and small lollipops. Then she decided to exchange 20% of her big lollipops for the small ones in the ratio of 1 : 4. After the exchange, she had 253 lollipops. What percentage of the lollipops she bought were small ones?
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Opal bought a total of 220 big and small lollipops. Then she decided to exchange 20% of her big lollipops for the small ones in the ratio of 1 : 4. After the exchange, she had 253 lollipops. What percentage of the lollipops she bought were small ones?