Answers

Add 50/40 and 72/90

1^st number: 1 10/40, 2^nd number: 72/90

50/40 + 72/90 is 41/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 90 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 40 × 9 = 360,
   50/40 = 50 × 9/40 × 9 = 450/360
3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
   72/90 = 72 × 4/90 × 4 = 288/360
4. Add the two like fractions:
   450/360 + 288/360 = 450 + 288/360 = 738/360
5. 738/360 simplified gives 41/20
6. So, 50/40 + 72/90 = 41/20
   In mixed form: 21/20

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