You are in charge of 65 youths. An extra staff member will be required if this population increases by 20%. What is the number of youths that would require an extra staff member?
What formula do u use to get the answer?
2007-12-04 13:11:12 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
65 X (20/100)
2007-12-04 13:26:03 · answer #1 · answered by Tim C 7 · 1⤊ 0⤋
65 youths is total initial population. You can say it is 100% of the initial population.
65=100% of pop.
If your population increases by 20%, then your new population is 120% of the initial population (100 + 20).
120% can be written as a decimal 1.2.
65(1.2)=120% of pop.
78=120% of pop.
For a required additional staff member, you need 78 youths.
2007-12-04 21:20:31 · answer #2 · answered by dantrc724 4 · 0⤊ 0⤋
Well, here's what you do. Multiply 65 by 1.20 (1 because the number needs to be larger and .20 because that's the percent it needs to increase by)
y=65*1.20
y=78
78 youths
honestly, there's no real good equation for this, it's easier just to understand the concept.
2007-12-04 21:17:24 · answer #3 · answered by pstwoorbust 3 · 0⤊ 0⤋