When you are multiplying two numbers with decimals, it's easy to do.
First, multiply the numbers as if there were not decimals there:
~5.8
x8.7
____
~406
464
_____
5046
... then, count the number of places for the decimal points, and add them together. 5.8 = 1 decimal place, 8.7 = 1 decimal place, the two added together are 2 decimal places. So your answer, 5046 needs to have two decimal places; or 50.46
(I'm sorry, I had to use a ~ to keep spacing correct... I'm having problems pushing a nbsp into the code... lol)
58% of 150 = 87 (150 / 100 x 58 = 87)
-87
The GCF is 29.
58 divided by 87 = 66.67%
58 * 7 = 406
58 multiplied by 70 is 4,060.
GCF(58, 29, 87) = 29.
3 multiplied by 29 equals 87.
87 x 66 = 5742
8 x 87 = 696
35 multiplied by 87 is 3,045.
44 multiplied by 87 is 3,828.