ossc CGL paper 1 mathematics fractions and decimal

Fractions

It refers to part of total.

It is written in form of a/b.  Where a = part of total or neuminator  b= total or denominator 

Fractions classification

 It is mainly classified into two type 

Similar fractions 

Dissimilar fractions

Similar fractions - A fractions is said to be Similar fractions similar fractions if the denominator of all fractions are equal.

E.g. 3/5,2/5,1/5

Dissimilar fractions-A fractions is said to be dissimilar fractions similar fractions if the denominator of all fractions are not  equal.

E.g 4/5,3/7,4/9

Who is greater ?

ଯଦି ଭଗ୍ନସଂଖ୍ୟା ଗୁଡ଼ିକ ସମଭଗ୍ନସଂଖ୍ୟା ହୋଇଥିବେ , ତେବେ ସେମାନଙ୍କ ମଧ୍ୟରୁ ଯେଉଁ ଭଗ୍ନ ସଂଖ୍ୟାର ଲବ ବଡ ହୋଇଥିବ ,ସେ ଭଗ୍ନ ସଂଖ୍ୟା ଟି ବୃହତ୍ତମ କୁହାଯିବ।

If the fractions are similar fractions, then the fraction whose numerator is larger is called the largest fraction.

Some fractions are given 

3/5,2/5,1/5

The fractions are all same denominator 5.

The fractions have highest neuminator is 3.

Hence the largest fractions amongs is 3/5.

If the fractions are not similar fractions then convert them to similar fractions. Then proceed as similar fractions.

Let some fractions are given 

 4/5,3/6,4/7

Convert above fractions into similar fractions.

Step 1  find LCM of all denominator.

The LCM of 5,7,6 is 210

Step 2  then make fractions having denominator of 210.

4/5

New denominator is 210

New neuminator is (210÷5)×4=42×4=168

Similar fractions is 4/5=168/210

Other are 

3/6=

4/7=

Trick smallest difference between neuminator and denominator.

DECIMAL