Hi everyone,
I feel pretty confident in my mental math skills, but sometimes I need additional time with division. Could you give me some hints for examples below.
-2.3/3.6 - I would multiply by 10 - 23/36 ≈ 60%
-70/85% - no clue for a shortcut
-707k/ 18 910 - 7 * 10^5 / 1.89 * 10^4 -- I know it is between 3.5 and 4, but don't know the exact
-88/1400 -- ?
Would love to hear your mental processes, thank you!