Add 15/4 and 72/90
1st number: 3 3/4, 2nd number: 72/90
15/4 + 72/90 is 91/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 4 × 45 = 180,
15/4 = 15 × 45/4 × 45 = 675/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
72/90 = 72 × 2/90 × 2 = 144/180 - Add the two like fractions:
675/180 + 144/180 = 675 + 144/180 = 819/180 - 819/180 simplified gives 91/20
- So, 15/4 + 72/90 = 91/20
In mixed form: 411/20
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