Explanation:
a)
she makes $44,600 per year.
that is rounded $3,716.67 per month.
the net monthly income is $2,415, so she has rounded deductions of
3716.67 - 2415 = $1,301.67
that is $15,620 per year.
100% = $44,600
1% = 100%/100 = $446
how many % ? that is how often 1% fits into the amount.
15620 / 446 = 35.02242152...%
b)
in 6 months she wants to save $1,800.
that means
1800/6 = $300 per month.
100% = $2,415
1% = $24.15
how many % ?
300 / 24.15 = 12.42236025...%
c)
I guess, the question is really, how much savings she accumulated then in 6 months after the raise.
so, after the raise, she makes now
2415 + 96.60 = $2,511.60
100% = $2,511.60
1% = $25.116
12.4223...% = 1%×12.4223... = 25.116×12.4223... = $312
in 6 months she has then saved
312×6 = $1,872