The only mammal species with less than four effective limbs are the sea mammals, like the orca, whale, sea lion, walrus etc. In some of them ther are still clear remnants of what once were hind legs; the orca and whale just have one tiny piece of bone left, so they can be regarded as really having less than four limbs. There are no land mammals with fewer than four limbs.
A frog? Maybe.
bumblebee bat
Four ninths is less than eight sixteenths.
Four hundred less than 135 is negative 265.
The smallest African mammal is the African pygmy shrew. This is also the smallest mammal in the entire world. They weigh less than 10 grams.
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two fifths is less than four sixths
A fraction less than four sixths would be 5/6!
Four fifths is less.
Four less than a number and three is the number less one.
Four less than the product of six and x is 6x - 4.
the greatest multiple of four less than 100, is 96