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:

i think this could be a possible answer (1 / 84) -1

good luck! : d