Answers

Subtract 84/63 from 16/90

1^st number: 16/90, 2^nd number: 1 21/63

16/90 - 84/63 is -52/45.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 63 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   16/90 = 16 × 7/90 × 7 = 112/630
3. Likewise, for the 2nd fraction, since 63 × 10 = 630,
   84/63 = 84 × 10/63 × 10 = 840/630
4. Subtract the two like fractions:
   112/630 - 840/630 = 112 - 840/630 = -728/630
5. After reducing the fraction, the answer is -52/45

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ³²/₉₀-⁸⁴/₆₃ ⁴⁸/₉₀-⁸⁴/₆₃ ⁸⁰/₉₀-⁸⁴/₆₃

Subtract Fractions Calculator