I think it's 74 because 3 has the factor :1,3
53 has the factor: 53,1
73 has the factor:1 ,73
74 has the factor:1,74,2,37
You end with 210.85. add 75.50 and 55.25 together you get 130.75. 130.75-25.15-18.65 = 86.95. 210.85-86.95= 123.90 work backwards.
Cindy used 17.25 because 15 × .5 = 2.25 and if you add it to 15 ypu get 17.25
I’m going to say it 3/5 because the other answer are too large
