Add 72/90 and 42/12
1st number: 72/90, 2nd number: 3 6/12
72/90 + 42/12 is 43/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
72/90 = 72 × 2/90 × 2 = 144/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
42/12 = 42 × 15/12 × 15 = 630/180 - Add the two like fractions:
144/180 + 630/180 = 144 + 630/180 = 774/180 - 774/180 simplified gives 43/10
- So, 72/90 + 42/12 = 43/10
In mixed form: 43/10
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