2.5 \div 20=x \%
Solve for x
x=12.5
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5\times 2.5=x
Multiply both sides of the equation by 100, the least common multiple of 20,100.
12.5=x
Multiply 5 and 2.5 to get 12.5.
x=12.5
Swap sides so that all variable terms are on the left hand side.
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