Add 20/90 and 42/48
20/90 + 42/48 is 79/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
20/90 = 20 × 8/90 × 8 = 160/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
42/48 = 42 × 15/48 × 15 = 630/720 - Add the two like fractions:
160/720 + 630/720 = 160 + 630/720 = 790/720 - 790/720 simplified gives 79/72
- So, 20/90 + 42/48 = 79/72
In mixed form: 17/72
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