43 because it is 23 more than 20 and 23 less than 86.
23/20 = 13/20
It is 20/23.
23/20 is equal to 1.15
3/4 + 2/5 = 15/20 + 8/20 = 23/20
20-23 $
You could use 23 * 17 = 23*(20 - 3) = 23*20 + 23*(- 3) = (20 + 3)*20 + (20+3)*(-3) = 20*20 + 3*20 + 20*(-3) + 3*(-3) = 400 + 60 - 60 - 9 = 391. I would however not that the two numbers are 20+1 and 20-3 and so look at the questions as a difference of two squares (DOTS). The answer, then is 23*17 = 202 - 32 = 400 - 9 = 391 So much shorter and simpler.
43 because it is 23 more than 20 and 23 less than 86.
23/20 = 13/20
It is 20/23.
$20
23/20 = 115%
23/20 is equal to 1.15
20
115% of 20= 115% * 20= 1.15 * 20= 23
3/4 + 2/5 = 15/20 + 8/20 = 23/20
20% of 23 is 4.60 so 23+ 4.60= 27.60