Question 504591
67.5m+45n=55(m+n)
67.5m+45n=55m+55n
12.5m=10n
1.25m=1n
m=.8n
For every part of 45 ground coffee, you need to use .8 parts of 67.5 ground coffee to get 55 ground coffee:
n+.8n=1
1.8n=1
n=1/1.8=.5556
.5556(45)+.4444(67.5)=25.002+29.997=54.9999.