Add 40/21 and 70/80
1st number: 1 19/21, 2nd number: 70/80
40/21 + 70/80 is 467/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
40/21 = 40 × 80/21 × 80 = 3200/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
70/80 = 70 × 21/80 × 21 = 1470/1680 - Add the two like fractions:
3200/1680 + 1470/1680 = 3200 + 1470/1680 = 4670/1680 - 4670/1680 simplified gives 467/168
- So, 40/21 + 70/80 = 467/168
In mixed form: 2131/168
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