0.23333
The decimal form of 7 over 10 is 0.7.
7/21:= 7 ÷ 21= 0.333 in decimal
7 over 30
3 over 7 = 0.42857142857143
.7
7 4/21 in decimal form is 7.190476 . . .
7/30 is in its simplest form.
7/30 is already in simplest form.
0.5714
.07
0.4375
0.143