Preparation sts maths for PST and JEST HOW TO FIND RATIO : AND Proportion::

IBA maths preparation for mathematics from ratio and proportion from class 6 Sindh textbook board how to find ratio and proportion
Q: if 20 metre cloth is used to make 4 dresses how much cloth is required to make such a 15 dressess?
dresses cloth
4 20m
15 ?
have a use a direct proportion
4:15::20:X

4×X=20×15
4X=300
X=300/4
X=75meters requirment of cloth 75 meters
PSt
JEST
IBA maths
sts
NTS
PTS

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