Question

1.)Write the ratio of 20 to 18 in lowest terms 2.)Find the supplement of <A. m<A =72 degrees. 3.)Place the following numbers in ascending order. -2/5, 1/6, 7/8, -5/9, 3/4

Answer 1

1) 20 : 18 = 10 : 9

2) ?

3) To solve this you need to find the least common denominator.

Answer 2

180 - 72 = 108

5
6 = 2*3
8 =2*2*2
9 = 3*3
4 = 2*2
so in the least common denominator we need
5, 2*2*2 , 3*3
which is
360
but without doing all that look more closely
two of your numbers are negative and two are positive
-2/5 = -18/45
-5/9 = -25/45
so your list starts with
-5/9 , -2/5
now look at those positive ones and think ruler
7/8 is bigger than 3/4
and 1/6 is tiny compared to them
so your full list is
-5/9, -2/5 , 1/6, 3/4, 7/8
so you do not need to use the least common denominator of the three positive numbers which is 24