maths homework help?

A company makes large bags of crisps which contain 90 grams of fat. The company aims to reduce the fat content of the crisps by 50%. They decide to reduce the fat content by 20% each year. Will they have achieved their aim by the end of the 3rd year? Justify your answer.

Answers
Well 50% of 90 is half of 90 which is 45. So you now need to see if the reduction of 20% each year for 3 years gets to 45 or below
javaid.aslam
17 April 2011
In the 1 st year 20% of 90 is 18 so the fat is reduced to 90 - 18 = 72
javaid.aslam
17 April 2011
After year 2 it is 20% of 72 which is 14.4 so the fat is reduced to 72 - 14.4 = 57.6
javaid.aslam
17 April 2011
After year 3 it is 20% of 57.6 = 11.52 so that fat is reduced to 57.6 - 11.52 = 46.08
javaid.aslam
17 April 2011
thank you very much for your help! very grateful!
rachel_dance123
17 April 2011
So they will not achieve their aim!
javaid.aslam
17 April 2011
No problems. Did you understand the answer to your other question today??
javaid.aslam
17 April 2011
yes, i asked my brother to show me how to do it.. and he knew what to do! thank you for your help for that too!
rachel_dance123
17 April 2011
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