(n-6)/(n-7)=9/2
-> 2(n-6)=9(n-7)
-> 2n-12=9n-63
-> 2n-9n=-63+12
-> -7n = -51
-> n = 51/7
The answer is n=51/7
This would be a 20% increase.
Work is provided in the image attached.
The left side can be condensed as a squared binomial:
If your adding its 17, Subtracting its 7, multiplying its 60 and dividing its 2.4 hope this helps
18/3.5=5.1 so you do 14/5.1=2.7
so your answer is 2.7 in