28/40 = 7/10
40 + 7 + 7 + 7 + 7 = 68
40% of $7= 40% * 7= 0.4 * 7= $2.80
7/40=0.175.
There isn't one. 7 cannot reduce and 18 can reduce, but not in a factor of 7.
5 - (40/7) = - 5/7(5 - 40)/7 = -5
Percent means "out of 100". To write a percentage as a fraction, put it over 100 and reduce to simplest terms. Example: 17.5% = 17.5/100 = 35/200 = 7/40 So 7% = 7/100
7/40 is in its simplest form
7/40 as a percentage = 100*7/40 = 17.5 %
0.175
40/7 = 5.7142857...
7/40 = 17.5%