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# Please help me in math i'm having a hard time solving

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1) Out of 7,125 kg of collected recyclable materials, 2,200 kg are made of plastic and the rest are non-plastic materials. What percent are made of non-plastic materials?

2) Luan bought 50 kg of cat food, if her cat ate 11 kg of it already, what percent of cat food was left?

3)  Chris missed 5 games in a game. If this was 12.5% of the total number of games, how many games are there in all? How many games did he win?

Thank you in advance.

Mar 2, 2022

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1)   7125   -  2200   =   4925 kg of non-plastics

Pct  of non-plastics =   4925  /  7125    ≈    69%

2)    To  see  this   let's  double the amt she bought and the amount the  cat ate

So  she buys 100 kg  and the  cat eats 22 kg

So    100 - 22  = 78 kg are left

So      78 /  100  =   78%  left

3)   5 games  of the total number   (T) =  12.5%  =  .125

So

5 / T  =   .125     multiply   both sides by  T

5 =  .125 T       divide both sides by  .125

5 / .125 =  T  =    40 games total

He must  have won   40 T - 5 he missed  =  35   Mar 2, 2022