\frac { 25 } { 100 } = 0.25 \quad \text { (c) } \frac { 5 } { 100 } =
Solve for c
c=20
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\frac{1}{4}=0.25c\times \frac{5}{100}
Reduce the fraction \frac{25}{100} to lowest terms by extracting and canceling out 25.
\frac{1}{4}=0.25c\times \frac{1}{20}
Reduce the fraction \frac{5}{100} to lowest terms by extracting and canceling out 5.
\frac{1}{4}=\frac{1}{4}c\times \frac{1}{20}
Convert decimal number 0.25 to fraction \frac{25}{100}. Reduce the fraction \frac{25}{100} to lowest terms by extracting and canceling out 25.
\frac{1}{4}=\frac{1\times 1}{4\times 20}c
Multiply \frac{1}{4} times \frac{1}{20} by multiplying numerator times numerator and denominator times denominator.
\frac{1}{4}=\frac{1}{80}c
Do the multiplications in the fraction \frac{1\times 1}{4\times 20}.
\frac{1}{80}c=\frac{1}{4}
Swap sides so that all variable terms are on the left hand side.
c=\frac{1}{4}\times 80
Multiply both sides by 80, the reciprocal of \frac{1}{80}.
c=\frac{80}{4}
Multiply \frac{1}{4} and 80 to get \frac{80}{4}.
c=20
Divide 80 by 4 to get 20.
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