Add 60/80 and 90/21
1st number: 60/80, 2nd number: 4 6/21
60/80 + 90/21 is 141/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
60/80 = 60 × 21/80 × 21 = 1260/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
90/21 = 90 × 80/21 × 80 = 7200/1680 - Add the two like fractions:
1260/1680 + 7200/1680 = 1260 + 7200/1680 = 8460/1680 - 8460/1680 simplified gives 141/28
- So, 60/80 + 90/21 = 141/28
In mixed form: 51/28
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