Irin, Ingrid and Nell bake chocolate chip cookies in the ratio of 9.18: 5.17: 2.05. If altogether they baked a batch of 170 cookies, what percent of the cookies did Irin bake?  Select the correct option:
A) 0.125%
B) 1.25%
C) 12.5%
D) 53.5%
E) 0.152%
9.18x+5.17x+2.05x = 16.4x 9.18 +5.17 +2.05= 
<gadget id="calculator">9.18 +5.17 +2.05</gadget>
<output>16.4</output>
16.4x= 170 cookies   x= 170/16.4 = 10 (approx)   So, Irin baked 10*9.18 cookies or 91 cookies (approx)   % share = 91/170= 53.5 approx   Hence, answer is 53.5%.
<result>D</result>
Irin, Ingrid and Nell bake chocolate chip cookies in the ratio of 9.18: 5.17: 2.05. If altogether they baked a batch of 170 cookies, what percent of the cookies did Irin bake?