14
the number = 20 Let N = the number 30% of N = 15% of 40 30% * N = 15% * 40 0.30N = 0.15* 40 0.30N/0.30 = 6/0.30 N = 20
n X .15 = 9 9 / .15 = n 9 / .15 = 60
The "answer" is the number that ' n ' must bein order for the statement to be true.15/(40-n) =1/5Multiply each side of the equation by (40-n):15 = (40-n)/5Multiply each side by ( -5 ):-75 = n-40Add 40 to each side:-35 = n
If -n = 40 then n = -40.
10.515% of 70: put n over 70 equals 15 over 100n ----------15--- equals ---- then cross multiply n x 100 and 15 x 7070---------100which would be 100n and 1050then divide100n --------1050------ equals ------- n equals 10.5%100 -----------100
40-n equals 28 = 12
40 percent of N = 0.4 x N
15 - n when n equals 9 = 6
If 15 percent of a number N is 0.3 what is 45 percent of N
40 x .85= 34
n = 3030 percent of n equals 930% * n = 930%/100% * n = 90.3n/0.3 = 9/0.3n = 30