Answers

Add 21/60 and 48/45

1^st number: 21/60, 2^nd number: 1 3/45

21/60 + 48/45 is 17/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 60 and 45 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 60 × 3 = 180,
   21/60 = 21 × 3/60 × 3 = 63/180
3. Likewise, for the 2nd fraction, since 45 × 4 = 180,
   48/45 = 48 × 4/45 × 4 = 192/180
4. Add the two like fractions:
   63/180 + 192/180 = 63 + 192/180 = 255/180
5. 255/180 simplified gives 17/12
6. So, 21/60 + 48/45 = 17/12
   In mixed form: 15/12

MathStep (Works offline)

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

Related: ⁴²/₆₀+⁴⁸/₄₅ ²¹/₆₀+⁹⁶/₄₅ ²¹/₆₀+⁴⁸/₉₀ ⁶³/₆₀+⁴⁸/₄₅

Add Fractions Calculator