Respuesta :
Answer:
Let's understand the concept:-
- Here 12 is 90% of a number.
- So we can say that 90% of That number is 12 .
- In this way we can get the the number
Solution:-
Let,
the number=x
According to the question ,
[tex]{:}\longrightarrow[/tex][tex]\sf 90\% \:of \;x=12 [/tex]
- We know 90%=90/100
- so add it
[tex]{:}\longrightarrow[/tex][tex]\sf {\dfrac {90}{100}}\times x=12 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf {\dfrac {90x}{100}}=12 [/tex]
- Now use cross multiplication method
[tex]{:}\longrightarrow[/tex][tex]\sf 90x=12\times 100 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf 90x=1200 [/tex]
- Now interchange sides .
[tex]{:}\longrightarrow[/tex][tex]\sf x={\dfrac {1200}{90}}[/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf x={\dfrac {200}{15}}[/tex]
- Answer will come in decimals so we take approximate value.
[tex]{:}\longrightarrow[/tex][tex]\sf x=13.3 [/tex]
[tex]{:}\longrightarrow[/tex][tex]\sf x=approximately \:13[/tex]
[tex]\therefore[/tex]The number is 13.
