Add 60/90 and 72/21
1st number: 60/90, 2nd number: 3 9/21
60/90 + 72/21 is 86/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
60/90 = 60 × 7/90 × 7 = 420/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
72/21 = 72 × 30/21 × 30 = 2160/630 - Add the two like fractions:
420/630 + 2160/630 = 420 + 2160/630 = 2580/630 - 2580/630 simplified gives 86/21
- So, 60/90 + 72/21 = 86/21
In mixed form: 42/21
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