Add 30/80 and 42/45
30/80 + 42/45 is 157/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
30/80 = 30 × 9/80 × 9 = 270/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
42/45 = 42 × 16/45 × 16 = 672/720 - Add the two like fractions:
270/720 + 672/720 = 270 + 672/720 = 942/720 - 942/720 simplified gives 157/120
- So, 30/80 + 42/45 = 157/120
In mixed form: 137/120
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