Eugenia's answer to Durkeswaran krishnan's Primary 6 Maths Percentage Singapore question.

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Eugenia's answer
23 answers (A Helpful Person)
To answer this question, first find out how many coins makes up 25% of 200 coins.
Next, find out what is 40% of 200 coins.
Lastly, deduct the number of coins Mei Ling already collected (which is the 25%) to get the number of $1 coins she needs to increase the percentage of coins to 40%.