Answers

Add 42/40 and 72/45

1^st number: 1 2/40, 2^nd number: 1 27/45

42/40 + 72/45 is 53/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 45 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   42/40 = 42 × 9/40 × 9 = 378/360
3. Likewise, for the 2nd fraction, since 45 × 8 = 360,
   72/45 = 72 × 8/45 × 8 = 576/360
4. Add the two like fractions:
   378/360 + 576/360 = 378 + 576/360 = 954/360
5. 954/360 simplified gives 53/20
6. So, 42/40 + 72/45 = 53/20
   In mixed form: 213/20

MathStep (Works offline)

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

Related: ⁸⁴/₄₀+⁷²/₄₅ ⁴²/₈₀+⁷²/₄₅ ⁴²/₄₀+⁷²/₉₀

Add Fractions Calculator