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?
Choose one
A) 0.125%
B) 1.25%
C) 31.7%
D) 125%
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= 148 cookies   x= 148/16.4 = 9 (approx)   So, Ingrid baked 9*5.17 cookies or 47 cookies (approx)   % share = 47/148 = 31.7 approx   Hence, answer is 31.7%.
<result>C</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?