Dividing by four is just one of many possibilities.
12/40 Divide 12 by 49 = 0.3
divide 12 by 40 and multiply by 100, so 12/40x100
40
Divide both by 4 so 12/40 = 3/10
3.3333
40
45
You divide by two 24~2=12 40~2=20 Eventually it will be 3 5
12 per 30 = ? You make the number on the right 100: 30x3.3=100 You do the same to the number on the left: 3.3x12= 40 12 per 30 = 40 per 100 We call that 40%.
3.3333
12/40 = 3/10 (divide top and bottom by common factor 4).
You divide by 12.You divide by 12.You divide by 12.You divide by 12.