2/10 reduces would be 1/5 so knowing that the ratio of cups of flour and pancake mix would be 1:5 or 20%
Well you don't have to subtract it you can also simply the expression
7i-16i
And you'll get 4-33i
Hopefully this helps you !
You get the expression;
3H-21
Hope this helps.
First add the fractions.
6/7 + 5/7 = 1 4/7
Then add the whole numbers
4 + 3 = 7
Then add the mixed number to the whole number
7 + 1 4/7 = 8 4/7
Your answer is 8 4/7