Let the original number be
The number decreased by 50% means that we will first calculate 50% of the original number and then subtract it from the original number x
Then, let's subtract the decreased value from the original value
The remaining value will be
The result is increased by 50% to get
The new value after increasing by 50 % can be gotten by adding the increased value to the remaining value
From the question, the new value =99
Therefore, the original value will be
Hence,
The original number = 132