Clues:
43516 27692 9890 49450 25714 1___ 45494 29670 9890 35604
1___
Instructions: Fill-in the Blank
_ _ _ _ a _ _ _ _
Clues:
43516 27692 9890 49450 25714 1___ 45494 29670 9890 35604
1___
Instructions: Fill-in the Blank
_ _ _ _ a _ _ _ _
Are you
CHAKA KHAN
Reasoning:
This looks like a fraction; let's try dividing the top by the bottom.
There are 2 '9890's; could be 'E'? 9890/5=1978, which is a year within the last century... promising. 43516/1978=22=V; looks like we are on track.
Continuing: 43516=V, 27692=N, 9890=E, 49450=Y, 25714=M, 1978=A, 45494=W, ?, 29670=O, 9890=E,35604=R
Giving:
V N E Y M A W O E R
After a lot of searching and anagramming, I stumbled across the following anagram:
E V E R Y W O M A N
A search reveals that according to https://en.wikipedia.org/wiki/I%27m_Every_Woman:
""I'm Every Woman" is a song by American singer Chaka Khan, released as her debut solo single from her first album, Chaka (1978)."
1978 matches the year we were looking for, and the singer's name, CHAKA KHAN, fits the final blanks, so our answer is found!