Question

21 : 80 is equivalent To​

Answer 1

Answer:

105:400

Step-by-step explanation:

There can be many ratios equivalent to 21:80

E.g -

105:400 which is obtained by multiplying the both numbers by 5

42:160 which is obtained by multiplying the both numbers by 2

• we can multiply the both numbers with the same number and get the answer .

Answer 2

Remember p/q = p x n/ q x n

Step-by-step explanation:

In order to get the fraction equivalent to the given fraction, one can multiply both the Numerator and Denominator with the SAME Number.

i.e. $\frac{p}{q} = \frac{p\times2}{q\times2}$

$\frac{p}{q} = \frac{p\times5}{q\times5}$

So, p/q = p x n/ q x n

Hence, For$\frac{21}{80}$ with 2 as multiple for Numerator and Denominator

$\frac{21}{80} = \frac{21\times2}{80\times2}$

$= \frac{42}{160}$

For $\frac{21}{80}$with 3 as multiple for Numerator and Denominator  

$\frac{21}{80} = \frac{21\times3}{80\times3}$

$= \frac{63}{240}$

For $\frac{21}{80}$ with 5 as Multiple for Numerator and Denominator

$\frac{21}{80} = \frac{21\times5}{80\times5}$

$= \frac{105}{400}$

Hence, We can Remember p/q = p x n/ q x n