80 percent of the 160 4th grade girls had long hair, and 85 percent of the 120 5th grade girls had long hair. Which class had more girls with long hair, and by how many?
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. 4th grade, 5 more
B. 4th grade, 26 more
C. 5th grade, 5 more
D. 5th grade, 26 more
her are your choses
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80% of 160 is 128
85% of 120 is 102
So 128 - 102 = 26
Obviously there are 26 girls more in 4th grade with long hair...
Fair enough? :)
Do you know how to get 80% of 160?
no i do not
Ok, you know that there are always 1-100%
So ANY number you are asked, just divide it but 100 first, and you will get value for 1%
And then multiply it by number you need, in this case 80...
160/100*80 = 128
120/100*85 = 102
If you need 5%
If you need 0.5%