Question

Cody was 160 cm. Tall on the first day of school this year, which was 10% taller than he was on the first day of school last year. How tall was Cody on the first day of school last year?

Answer 1

To do this problem you have to first take 10% of 160, which is .10 * 160 = 16. Then you subtract this from his height this year, or 160 - 16, and you get 144. Therefore Cody was 144 cm on the first day of school last year

Answer 2

Let X = height of Cody on the first day of school last year

Given: Y= height of Cody on the first day of school year = 160 cm

10%(X)+X=Y

.10(X)+X=160

1.10X=160

X=160/1.1

X= 145.45.cm = height of Cody on the first day of school last year

Hope it helps

★彡 by beza5 彡★