BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

percentage problem

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 171
Joined: Sat May 03, 2008 3:51 pm
Thanked: 8 times
by wawatan » Sun May 25, 2008 2:47 pm
A doctor prescribed 18 cubic centimeters of a certain drug to a patient whose body weight was 120 pounds. If the typical dosage is 2 cubic centimeters per 15 pounds of body weight, by what percent was the prescribed dosage greater than the typical dosage?

8
9
11
12.5
14.8

OA is D
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 192
Joined: Tue Apr 29, 2008 7:41 am
Thanked: 14 times

by aatech » Sun May 25, 2008 6:38 pm
For 15 pounds of weight 2 CC of medicine is required,

so for 120 pounds 2*120/15 = 16 cc of medicine is required

Doctor prescribed 18 cc

% extra = 2*100/16 = 12.5
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 320
Joined: Sun Jan 13, 2008 10:00 pm
Thanked: 10 times

by ildude02 » Tue May 27, 2008 5:12 pm
aatech wrote:For 15 pounds of weight 2 CC of medicine is required,

so for 120 pounds 2*120/15 = 16 cc of medicine is required

Doctor prescribed 18 cc

% extra = 2*100/16 = 12.5
Why is it not 2*100/18 ?? Do we normally treat this kind of question like a
%increase, where the denominator is always the lowest of the 2 values?

Otherwise, I would have had an equation like this,

x/100 * 18 = 18-16.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 631
Joined: Mon Feb 18, 2008 11:57 pmFollowed by: 3 members
Thanked: 29 times

by netigen » Tue May 27, 2008 8:20 pm
you will calculate the increase over what the dosage should have been i.e. over 16

since overage is 2 the eq is 2/16 x 100 = 12.5
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1