Add 45/42 and 72/70
1st number: 1 3/42, 2nd number: 1 2/70
45/42 + 72/70 is 21/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
45/42 = 45 × 5/42 × 5 = 225/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
72/70 = 72 × 3/70 × 3 = 216/210 - Add the two like fractions:
225/210 + 216/210 = 225 + 216/210 = 441/210 - 441/210 simplified gives 21/10
- So, 45/42 + 72/70 = 21/10
In mixed form: 21/10
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