40-12=28
he is40
50
7.996
13.3333
-y minus 12 is 12.
5.196 is 40% of 12.99
3 - (-12) = 3 + 12 = 15.
(40 / 100) * 25 = 10
24 is 40% of 60 .
12 minus -5 is 17.
-22 - 12 = -8
minus 21 think of it as 12+9 which equals 21 then just whack a minus sign infront