Question

*24. find the unknown number
\\(\frac{4}{5} = \frac{?}{100}\\)

Explanation:

Step1: Let the unknown number be \( x \). So the equation is \( \frac{4}{5}=\frac{x}{100} \).

Step2: Cross - multiply. We know that in a proportion \( \frac{a}{b}=\frac{c}{d} \), \( a\times d = b\times c \). Here, \( a = 4 \), \( b = 5 \), \( c = x \), \( d = 100 \). So \( 5\times x=4\times100 \).

Step3: Solve for \( x \). Calculate \( 4\times100 = 400 \), then \( x=\frac{400}{5} \).

Step4: Divide 400 by 5. \( \frac{400}{5}=80 \).

Answer:

80