Explanation: Sounds like my problem in math class, I always do mental math, and the teacher always asks me to show my work.
So anyway, 7/10 with work being shown would be… uh complicate the math. Set it up as long division. So 7/10 (I hope you know how to set up long division, because I can’t type it.) And just solve it with that. It’s not going to be different, but it will have the appearance that you used an on paper equation to solve it.