Question
PSLE
At first, Leah had a total of 54 brown and black balloons. 13 black balloons burst. She then increased the number of brown balloons by 75%. After that, Leah had a total of 47 balloons. How many black balloons did she have at first?
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PSLE
At first, Leah had a total of 54 brown and black balloons. 13 black balloons burst. She then increased the number of brown balloons by 75%. After that, Leah had a total of 47 balloons. How many black balloons did she have at first?