What is 21/15-4/3?

How much is 2115 minus 43. Step by step solution expressed as a proper or improper fraction, mixed number and decimal form.

  • 115
  • 0.0667 (rounded to 4 decimals)

Step by step solution

Subtract

2115 - 43 = 115

  1. Find common denominator by finding the Least Common Multiple(LCM)

    Multiples of 15 are   15 ....etc

    Multiples of 3 are   3, 6, 9, 12, 15 ...etc

    The LCM of 15 and 3 is 15. So, the common denominator of 2115 and 43 is 15. Now change the fractions into equivalent fractions with common denominator

    • 2115 - 43
    • 21 * 115 * 1 - 4 * 53 * 5
    • 2115 - 2015
  2. Subtract

    • 2115 - 2015
    • 21 - 2015
    • 115

    Subtract the numerators and place the difference over the common denominator.

Simplify

  • 115
  1. Reduce fraction to its lowest terms

    The greatest common divisor of 1 and 15 is 1, the fraction 115 cannot be further simplified or reduced to lowest terms