Answers

Add 70/84 and 3/90

70/84 + 3/90 is 13/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   70/84 = 70 × 15/84 × 15 = 1050/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   3/90 = 3 × 14/90 × 14 = 42/1260
4. Add the two like fractions:
   1050/1260 + 42/1260 = 1050 + 42/1260 = 1092/1260
5. 1092/1260 simplified gives 13/15
6. So, 70/84 + 3/90 = 13/15

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