Add 70/25 and 21/90
1st number: 2 20/25, 2nd number: 21/90
70/25 + 21/90 is 91/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
70/25 = 70 × 18/25 × 18 = 1260/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
21/90 = 21 × 5/90 × 5 = 105/450 - Add the two like fractions:
1260/450 + 105/450 = 1260 + 105/450 = 1365/450 - 1365/450 simplified gives 91/30
- So, 70/25 + 21/90 = 91/30
In mixed form: 31/30
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