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 148 cookies, what percent of the cookies did Ingrid bake? Options.
A) 0.125%  B) 1.25%  C) 12.5%  D) 30%  E) 0.352%
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, Ingrid baked 10*5.17 cookies or 51 cookies (approx)   % share = 51/170 =30 approx   Hence, answer is 30%.
<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 148 cookies, what percent of the cookies did Ingrid bake?