97/100 − 40/100 = 57/100
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It's 2 over 5, or 2/5.
9/40 is already simplified.
no 31 over 40 cannot be simplified. it can't be simplified because when you divide 40 by 31 you get 1.290322581. as you can see: not a whole number. to know if any fraction can be simplified when you divide them (denomiantor or bottom number first) the outcome must be a whole number.
It is -13/40
27/40 67.5/100 = 135/200 (multiply top and bottom by 2 to make whole numbers) = 27/40 (divide top and bottom by hcf(135, 200) = 5)