Add 72/20 and 45/40
1st number: 3 12/20, 2nd number: 1 5/40
72/20 + 45/40 is 189/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
72/20 = 72 × 2/20 × 2 = 144/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
45/40 = 45 × 1/40 × 1 = 45/40 - Add the two like fractions:
144/40 + 45/40 = 144 + 45/40 = 189/40 - So, 72/20 + 45/40 = 189/40
In mixed form: 429/40
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