Q. Convert the following repeating decimal to a fraction in simplest form..96Answer:
Denote Repeating Decimal: Let's denote the repeating decimal 0.9 with a repeating 6 as x. x=0.966666...To convert this repeating decimal to a fraction, we can use an algebraic method where we multiply x by a power of 10 to move the decimal point to the right of the repeating digits.
Multiply by 10: We multiply x by 10 to shift the decimal point one place to the right:10x=9.666666...Notice that the digits after the decimal point are the same as in x, which is crucial for the next step.
Subtract to Eliminate Decimals: Now we set up an equation to subtract x from 10x, which will eliminate the repeating decimals:10x−x=9.666666...−0.966666...This subtraction will give us a whole number on the right side of the equation.
Solve for x: Performing the subtraction, we get:9x=8.7Now we have an equation without repeating decimals that we can solve for x.
Divide by 9: To find x, we divide both sides of the equation by 9:x=98.7
Convert to Fraction: Now we convert the decimal 8.7 to a fraction. The decimal 8.7 is the same as 1087, so we substitute that into our equation:x=91087
Simplify Fraction: To simplify the fraction, we multiply the denominator 10 by 9:x=(10×9)87x=9087
Find GCD and Divide: We can simplify the fraction 9087 by finding the greatest common divisor (GCD) of 87 and 90 and dividing both the numerator and the denominator by the GCD.The GCD of 87 and 90 is 3.
Final Simplified Fraction: Divide both the numerator and the denominator by the GCD:x=(87÷3)/(90÷3)x=3029This is the fraction in its simplest form.