Add 70/20 and 42/45
1st number: 3 10/20, 2nd number: 42/45
70/20 + 42/45 is 133/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
42/45 = 42 × 4/45 × 4 = 168/180 - Add the two like fractions:
630/180 + 168/180 = 630 + 168/180 = 798/180 - 798/180 simplified gives 133/30
- So, 70/20 + 42/45 = 133/30
In mixed form: 413/30
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