Do 100-45 and you get 55. So it is 55 classrooms that are not Math and Science.
8.263-13.48= -5.217
I suggest using a calculator for math that is hard to work out in your head.
0.91428571428 is 5 and 5/7- 4 and 4/5
So just find the factors of 90
90=2 times 3 times 3 times 5
so the factors could be
2,3,15
2,9,5
6,3,5
10,3,3
there are 4our
12w + 13¹/₃ = -6
<u> - 13¹/₃ - 13¹/₃
</u> <u>12w</u> = <u>-19¹/₃
</u> 12 12<u>
</u> w = -1¹¹/₁₈
