11. There are 80 coins of $5 in the purse. These coins constitute 20 % of its total coins. How many coins are there in the purse?
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The number of $ 5 is 80
This is equal to :
20%
The total coins are represented by 100%
If 20% = 80
100% =?
100/20 × 80 = 400
The total number of coins are : 400 coins
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