Add 70/90 and 72/80
70/90 + 72/80 is 151/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
70/90 = 70 × 8/90 × 8 = 560/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
72/80 = 72 × 9/80 × 9 = 648/720 - Add the two like fractions:
560/720 + 648/720 = 560 + 648/720 = 1208/720 - 1208/720 simplified gives 151/90
- So, 70/90 + 72/80 = 151/90
In mixed form: 161/90
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