Answers

Add 90/45 and 40/56

1^st number: 2 0/45, 2^nd number: 40/56

90/45 + 40/56 is 19/7.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 56 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 45 × 56 = 2520,
   90/45 = 90 × 56/45 × 56 = 5040/2520
3. Likewise, for the 2nd fraction, since 56 × 45 = 2520,
   40/56 = 40 × 45/56 × 45 = 1800/2520
4. Add the two like fractions:
   5040/2520 + 1800/2520 = 5040 + 1800/2520 = 6840/2520
5. 6840/2520 simplified gives 19/7
6. So, 90/45 + 40/56 = 19/7
   In mixed form: 25/7

MathStep (Works offline)

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

Related: ⁹⁰/₄₅+⁸⁰/₅₆

Add Fractions Calculator