Answers

Add 4/90 and 15/80

4/90 + 15/80 is 167/720.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 80 is 720
2. For the 1st fraction, since 90 × 8 = 720,
   4/90 = 4 × 8/90 × 8 = 32/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   15/80 = 15 × 9/80 × 9 = 135/720
4. Add the two fractions:
   32/720 + 135/720 = 32 + 135/720 = 167/720
5. So, 4/90 + 15/80 = 167/720

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