Answers

Add 90/72 and 16/70

1^st number: 1 18/72, 2^nd number: 16/70

90/72 + 16/70 is 207/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 70 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 72 × 35 = 2520,
   90/72 = 90 × 35/72 × 35 = 3150/2520
3. Likewise, for the 2nd fraction, since 70 × 36 = 2520,
   16/70 = 16 × 36/70 × 36 = 576/2520
4. Add the two like fractions:
   3150/2520 + 576/2520 = 3150 + 576/2520 = 3726/2520
5. 3726/2520 simplified gives 207/140
6. So, 90/72 + 16/70 = 207/140
   In mixed form: 167/140

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