Hi,
To find the value of the number we have to first find the value of the single percantage of this number. We can do so by dividing 35 with 20.
[tex]35 \div 20 = 1.75[/tex]
The value of single percantage would be 1.75.
Mathematically: 1% = 1.75
Now to get the value of 50% we simply multiply the value of 1% with 50.
[tex]1.75 \times 50 = 87.5[/tex]
So 50% of unknown number is 87.5 that would be the ANSWER (D).
Hope this helps.
If you posses and other questions related to the answer leave a comment and I will reply.
Cheers, r3t40
