Answers

Add 72/56 and 42/90

1^st number: 1 16/56, 2^nd number: 42/90

72/56 + 42/90 is 184/105.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 90 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 56 × 45 = 2520,
   72/56 = 72 × 45/56 × 45 = 3240/2520
3. Likewise, for the 2nd fraction, since 90 × 28 = 2520,
   42/90 = 42 × 28/90 × 28 = 1176/2520
4. Add the two like fractions:
   3240/2520 + 1176/2520 = 3240 + 1176/2520 = 4416/2520
5. 4416/2520 simplified gives 184/105
6. So, 72/56 + 42/90 = 184/105
   In mixed form: 179/105

MathStep (Works offline)

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

Related: ⁷²/₅₆+⁸⁴/₉₀

Add Fractions Calculator