Subtracting fractions with unlike denominators

Step-by-step explanation:

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

LCD(9/4, 5/10) = 20

Complete the multiplication and the equation becomes

The two fractions now have like denominators so you can subtract the numerators.

Then:

This fraction can be reduced by dividing both the numerator and denominator by the Greatest Common Factor of 35 and 20 using

GCF(35,20) = 5

The fraction

is the same as

7 ÷ 4

Therefore:

Apply the fractions formula for subtraction, to

and solve

Reduce by dividing both the numerator and denominator by the Greatest Common Factor GCF(70,40) = 10

Convert to a mixed number using

long division for 7 ÷ 4 = 1R3, so

Therefore:

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b