Add 70/60 and 45/21
1st number: 1 10/60, 2nd number: 2 3/21
70/60 + 45/21 is 139/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
70/60 = 70 × 7/60 × 7 = 490/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
45/21 = 45 × 20/21 × 20 = 900/420 - Add the two like fractions:
490/420 + 900/420 = 490 + 900/420 = 1390/420 - 1390/420 simplified gives 139/42
- So, 70/60 + 45/21 = 139/42
In mixed form: 313/42
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