Question
PSLE
At first, Leah had a total of 74 gold and black balloons. 20 black balloons burst. She then increased the number of gold balloons by 75%. After that, Leah had a total of 72 balloons. How many black balloons did she have at first?
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PSLE
At first, Leah had a total of 74 gold and black balloons. 20 black balloons burst. She then increased the number of gold balloons by 75%. After that, Leah had a total of 72 balloons. How many black balloons did she have at first?