Function rational_subtract

numpy/core/src/umath/_rational_tests.c:205–210

}

static inline rational
rational_subtract(rational x, rational y) {
    /* We're safe from overflow as with + */
    return make_rational_fast((npy_int64)x.n*d(y)-(npy_int64)d(x)*y.n,
        (npy_int64)d(x)*d(y));
}

static inline rational
rational_multiply(rational x, rational y) {