Add 80/60 and 60/70, Solve 1 20/60 + 60/70 as a fraction

Add 80/60 and 60/70

1^st number: 1 20/60, 2^nd number: 60/70

80/60 + 60/70 is 46/21.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
80/60 = 80 × 7/60 × 7 = 560/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
60/70 = 60 × 6/70 × 6 = 360/420
Add the two like fractions:
560/420 + 360/420 = 560 + 360/420 = 920/420
920/420 simplified gives 46/21
So, 80/60 + 60/70 = 46/21
In mixed form: 24/21

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