No.
0.075
5/8th + 8/5th is easier to work out if they are converted to the same fractions, they can both easily be converted to 40ths. 5/8th = 25/40ths 8/5ths = 64/40ths. So 25/40ths + 64/40ths = 89/40ths, which is 2 and 9/40ths.
3/40 = 0.075
6 and 3 40ths.
0.2
9/40ths
If you mean 6/40 then as a decimal it is 0.15
Connor bryne is in his 20ths or 40ths but i think 42.
Expressed as a proper fraction in its simplest form, by dividing the numerator and denominator by 5, 15/40 is equal to 3/8 or three eighths.
4 3/5 - 2 7/8 23/5 - 23/8 184/40 - 115/40 69/40 1 29/40ths or 1.725
3 percent out of 100 percent = 0.03 x 100 percent = 3 percent