Percentage word problems

A recipe for orange juice uses 50% orange concentrate. If a batch contains 10 cups of orange concentrate, how large is the batch of orange juice?

Lily completed 15 science problems. This is 30% of the problems she has to do. How many science problems must she do in total?

Ryan scored 40% of the shots he took during the basketball game. If he attempted 25 shots, how many times did he score?

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