504
LCD(90, 72) = 360
LCD= Lowest Common Denominator=72
42% of 72 = 42% * 72 = 0.42 * 72 = 30.24
The LCD of 6 and 7 is 42
LCD depend only on the denominators and LCD(8232, 72) = 24696.
30 + 42 = 72
72 + 72 + 42 = 186
42
42 will not divide evenly into 72. You an divide 42 into 72 but there will be a fraction.
42
It is: 42+30 = 72
72