Answers

Add 42/72 and 28/70

42/72 + 28/70 is 59/60.

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,
   42/72 = 42 × 35/72 × 35 = 1470/2520
3. Likewise, for the 2nd fraction, since 70 × 36 = 2520,
   28/70 = 28 × 36/70 × 36 = 1008/2520
4. Add the two like fractions:
   1470/2520 + 1008/2520 = 1470 + 1008/2520 = 2478/2520
5. 2478/2520 simplified gives 59/60
6. So, 42/72 + 28/70 = 59/60

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