1. 27=0.9x
27/0.9=x
x=30
2. 64=0.4x
64/0.4=x
x=160
3. 82=0.2x
82/0.2=x
x=410
Divide the known value by the percentage.
1. 27 / 0.90 = 30
2. 64 / 0.40 = 160
3. 82 / 0.20 = 410
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