Thread: Easy question

I just need to solve this with explenation, and i think that i am right and my book is wrong just want to verify


An elastic is stretched by 86% to a length of 5.8 m. Calculate the original length.
Thanks

Originally Posted by shanerocks

I just need to solve this with explenation, and i think that i am right and my book is wrong just want to verify


An elastic is stretched by 86% to a length of 5.8 m. Calculate the original length.
Thanks

Let the original length be

We have

thanks, why is it 1.86

Originally Posted by shanerocks

thanks, why is it 1.86

i wrote the percentage as a fraction. the original length is 100%, written as a decimal, that is 1. then we stretch it by 86%, that is, 0.86. so the new length will be 1 + 0.86 times the old length, or 1.86 times the old length, since 1.86 mean 186%

see http://www.mathhelpforum.com/math-he...in-freeze.html for more info