We have a question: John's grill messes up and burns half his steak. He eats 80% of what isn't burned. If the steak was originally 30 ounces how much steak did he eat?
And an answer: 12
So how you got the answer?
There were 30 * .5 = 15 ounces of unburnt steak. So he ate 15 * .8 = 12 ounces of steak.

We have a question: Quinten sees three buildings downtown and decides to estimate their heights. He knows from a book on local buildings that the one in the middle is 100 feet tall. The one on the left looks like it is 80% of the height of the middle one. The one on the right looks 20 feet shorter than if the building on the left and middle were stacked on top of each other. How tall does Quinten estimate their total height to be?
And an answer: 340
So how you got the answer?
He estimates the building on the left is 80 feet tall because 100 x .8 = 80. The combined height of the left and middle is 180 because 100 + 80 = 180. The building on the right he estimates as 160 feet because 180 - 20 = 160. He estimates the combined height as 340 feet because 80 + 100 + 160 = 340.

We have a question: John decides to get gym memberships so he can get in shape. The gym close to his house is close but doesn't have everything he wants so he gets two different gym memberships. The cheap one costs $10 a month and has a sign-up fee of $50. The second gym is 3 times more expensive and it has a sign-up fee of 4 months membership. How much total did he pay in the first year for gym membership?
And an answer: 650
So how you got the answer?
The cheap gym cost 10 * 12 = $120 for monthly fees. So the total cost was 120 + 50 = $170. The more expensive gym cost 3 * 10 = $30 per month. That means the sign - up fee was 30 * 4 = $120. The monthly fees for the expensive gym comes out to 30 * 12 = $360 per year. So the total cost for the expensive gym was 360 + 120 = $480. So his total cost was 480 + 170 = $650.