Add 70/42 and 72/28, Solve 1 28/42 + 2 16/28 as a fraction

Add 70/42 and 72/28

1^st number: 1 28/42, 2^nd number: 2 16/28

70/42 + 72/28 is 89/21.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84

Next, find the equivalent fraction of both fractional numbers with denominator 84
For the 1st fraction, since 42 × 2 = 84,
70/42 = 70 × 2/42 × 2 = 140/84
Likewise, for the 2nd fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84
Add the two like fractions:
140/84 + 216/84 = 140 + 216/84 = 356/84
356/84 simplified gives 89/21
So, 70/42 + 72/28 = 89/21
In mixed form: 45/21

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