Add 81/60 and 32/70, Solve 1 21/60 + 32/70 as a fraction

Add 81/60 and 32/70

1^st number: 1 21/60, 2^nd number: 32/70

81/60 + 32/70 is 253/140.

Find the least common denominator or LCM of the two denominators:
LCM of 60 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
32/70 = 32 × 6/70 × 6 = 192/420
Add the two like fractions:
567/420 + 192/420 = 567 + 192/420 = 759/420
759/420 simplified gives 253/140
So, 81/60 + 32/70 = 253/140
In mixed form: 1113/140

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad