\frac { 400 } { x } = 1 \%
Solve for x
x=40000
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100\times 400=x
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 100x, the least common multiple of x,100.
40000=x
Multiply 100 and 400 to get 40000.
x=40000
Swap sides so that all variable terms are on the left hand side.
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